diff --git a/vendor/github.com/spf13/cobra/bash_completions.go b/vendor/github.com/spf13/cobra/bash_completions.go
new file mode 100644
index 0000000..8fa8f48
--- /dev/null
+++ b/vendor/github.com/spf13/cobra/bash_completions.go
@@ -0,0 +1,584 @@
+package cobra
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"os"
+	"sort"
+	"strings"
+
+	"github.com/spf13/pflag"
+)
+
+// Annotations for Bash completion.
+const (
+	BashCompFilenameExt     = "cobra_annotation_bash_completion_filename_extensions"
+	BashCompCustom          = "cobra_annotation_bash_completion_custom"
+	BashCompOneRequiredFlag = "cobra_annotation_bash_completion_one_required_flag"
+	BashCompSubdirsInDir    = "cobra_annotation_bash_completion_subdirs_in_dir"
+)
+
+func writePreamble(buf *bytes.Buffer, name string) {
+	buf.WriteString(fmt.Sprintf("# bash completion for %-36s -*- shell-script -*-\n", name))
+	buf.WriteString(fmt.Sprintf(`
+__%[1]s_debug()
+{
+    if [[ -n ${BASH_COMP_DEBUG_FILE} ]]; then
+        echo "$*" >> "${BASH_COMP_DEBUG_FILE}"
+    fi
+}
+
+# Homebrew on Macs have version 1.3 of bash-completion which doesn't include
+# _init_completion. This is a very minimal version of that function.
+__%[1]s_init_completion()
+{
+    COMPREPLY=()
+    _get_comp_words_by_ref "$@" cur prev words cword
+}
+
+__%[1]s_index_of_word()
+{
+    local w word=$1
+    shift
+    index=0
+    for w in "$@"; do
+        [[ $w = "$word" ]] && return
+        index=$((index+1))
+    done
+    index=-1
+}
+
+__%[1]s_contains_word()
+{
+    local w word=$1; shift
+    for w in "$@"; do
+        [[ $w = "$word" ]] && return
+    done
+    return 1
+}
+
+__%[1]s_handle_reply()
+{
+    __%[1]s_debug "${FUNCNAME[0]}"
+    case $cur in
+        -*)
+            if [[ $(type -t compopt) = "builtin" ]]; then
+                compopt -o nospace
+            fi
+            local allflags
+            if [ ${#must_have_one_flag[@]} -ne 0 ]; then
+                allflags=("${must_have_one_flag[@]}")
+            else
+                allflags=("${flags[*]} ${two_word_flags[*]}")
+            fi
+            COMPREPLY=( $(compgen -W "${allflags[*]}" -- "$cur") )
+            if [[ $(type -t compopt) = "builtin" ]]; then
+                [[ "${COMPREPLY[0]}" == *= ]] || compopt +o nospace
+            fi
+
+            # complete after --flag=abc
+            if [[ $cur == *=* ]]; then
+                if [[ $(type -t compopt) = "builtin" ]]; then
+                    compopt +o nospace
+                fi
+
+                local index flag
+                flag="${cur%%=*}"
+                __%[1]s_index_of_word "${flag}" "${flags_with_completion[@]}"
+                COMPREPLY=()
+                if [[ ${index} -ge 0 ]]; then
+                    PREFIX=""
+                    cur="${cur#*=}"
+                    ${flags_completion[${index}]}
+                    if [ -n "${ZSH_VERSION}" ]; then
+                        # zsh completion needs --flag= prefix
+                        eval "COMPREPLY=( \"\${COMPREPLY[@]/#/${flag}=}\" )"
+                    fi
+                fi
+            fi
+            return 0;
+            ;;
+    esac
+
+    # check if we are handling a flag with special work handling
+    local index
+    __%[1]s_index_of_word "${prev}" "${flags_with_completion[@]}"
+    if [[ ${index} -ge 0 ]]; then
+        ${flags_completion[${index}]}
+        return
+    fi
+
+    # we are parsing a flag and don't have a special handler, no completion
+    if [[ ${cur} != "${words[cword]}" ]]; then
+        return
+    fi
+
+    local completions
+    completions=("${commands[@]}")
+    if [[ ${#must_have_one_noun[@]} -ne 0 ]]; then
+        completions=("${must_have_one_noun[@]}")
+    fi
+    if [[ ${#must_have_one_flag[@]} -ne 0 ]]; then
+        completions+=("${must_have_one_flag[@]}")
+    fi
+    COMPREPLY=( $(compgen -W "${completions[*]}" -- "$cur") )
+
+    if [[ ${#COMPREPLY[@]} -eq 0 && ${#noun_aliases[@]} -gt 0 && ${#must_have_one_noun[@]} -ne 0 ]]; then
+        COMPREPLY=( $(compgen -W "${noun_aliases[*]}" -- "$cur") )
+    fi
+
+    if [[ ${#COMPREPLY[@]} -eq 0 ]]; then
+        declare -F __custom_func >/dev/null && __custom_func
+    fi
+
+    # available in bash-completion >= 2, not always present on macOS
+    if declare -F __ltrim_colon_completions >/dev/null; then
+        __ltrim_colon_completions "$cur"
+    fi
+
+    # If there is only 1 completion and it is a flag with an = it will be completed
+    # but we don't want a space after the =
+    if [[ "${#COMPREPLY[@]}" -eq "1" ]] && [[ $(type -t compopt) = "builtin" ]] && [[ "${COMPREPLY[0]}" == --*= ]]; then
+       compopt -o nospace
+    fi
+}
+
+# The arguments should be in the form "ext1|ext2|extn"
+__%[1]s_handle_filename_extension_flag()
+{
+    local ext="$1"
+    _filedir "@(${ext})"
+}
+
+__%[1]s_handle_subdirs_in_dir_flag()
+{
+    local dir="$1"
+    pushd "${dir}" >/dev/null 2>&1 && _filedir -d && popd >/dev/null 2>&1
+}
+
+__%[1]s_handle_flag()
+{
+    __%[1]s_debug "${FUNCNAME[0]}: c is $c words[c] is ${words[c]}"
+
+    # if a command required a flag, and we found it, unset must_have_one_flag()
+    local flagname=${words[c]}
+    local flagvalue
+    # if the word contained an =
+    if [[ ${words[c]} == *"="* ]]; then
+        flagvalue=${flagname#*=} # take in as flagvalue after the =
+        flagname=${flagname%%=*} # strip everything after the =
+        flagname="${flagname}=" # but put the = back
+    fi
+    __%[1]s_debug "${FUNCNAME[0]}: looking for ${flagname}"
+    if __%[1]s_contains_word "${flagname}" "${must_have_one_flag[@]}"; then
+        must_have_one_flag=()
+    fi
+
+    # if you set a flag which only applies to this command, don't show subcommands
+    if __%[1]s_contains_word "${flagname}" "${local_nonpersistent_flags[@]}"; then
+      commands=()
+    fi
+
+    # keep flag value with flagname as flaghash
+    # flaghash variable is an associative array which is only supported in bash > 3.
+    if [[ -z "${BASH_VERSION}" || "${BASH_VERSINFO[0]}" -gt 3 ]]; then
+        if [ -n "${flagvalue}" ] ; then
+            flaghash[${flagname}]=${flagvalue}
+        elif [ -n "${words[ $((c+1)) ]}" ] ; then
+            flaghash[${flagname}]=${words[ $((c+1)) ]}
+        else
+            flaghash[${flagname}]="true" # pad "true" for bool flag
+        fi
+    fi
+
+    # skip the argument to a two word flag
+    if __%[1]s_contains_word "${words[c]}" "${two_word_flags[@]}"; then
+        c=$((c+1))
+        # if we are looking for a flags value, don't show commands
+        if [[ $c -eq $cword ]]; then
+            commands=()
+        fi
+    fi
+
+    c=$((c+1))
+
+}
+
+__%[1]s_handle_noun()
+{
+    __%[1]s_debug "${FUNCNAME[0]}: c is $c words[c] is ${words[c]}"
+
+    if __%[1]s_contains_word "${words[c]}" "${must_have_one_noun[@]}"; then
+        must_have_one_noun=()
+    elif __%[1]s_contains_word "${words[c]}" "${noun_aliases[@]}"; then
+        must_have_one_noun=()
+    fi
+
+    nouns+=("${words[c]}")
+    c=$((c+1))
+}
+
+__%[1]s_handle_command()
+{
+    __%[1]s_debug "${FUNCNAME[0]}: c is $c words[c] is ${words[c]}"
+
+    local next_command
+    if [[ -n ${last_command} ]]; then
+        next_command="_${last_command}_${words[c]//:/__}"
+    else
+        if [[ $c -eq 0 ]]; then
+            next_command="_%[1]s_root_command"
+        else
+            next_command="_${words[c]//:/__}"
+        fi
+    fi
+    c=$((c+1))
+    __%[1]s_debug "${FUNCNAME[0]}: looking for ${next_command}"
+    declare -F "$next_command" >/dev/null && $next_command
+}
+
+__%[1]s_handle_word()
+{
+    if [[ $c -ge $cword ]]; then
+        __%[1]s_handle_reply
+        return
+    fi
+    __%[1]s_debug "${FUNCNAME[0]}: c is $c words[c] is ${words[c]}"
+    if [[ "${words[c]}" == -* ]]; then
+        __%[1]s_handle_flag
+    elif __%[1]s_contains_word "${words[c]}" "${commands[@]}"; then
+        __%[1]s_handle_command
+    elif [[ $c -eq 0 ]]; then
+        __%[1]s_handle_command
+    elif __%[1]s_contains_word "${words[c]}" "${command_aliases[@]}"; then
+        # aliashash variable is an associative array which is only supported in bash > 3.
+        if [[ -z "${BASH_VERSION}" || "${BASH_VERSINFO[0]}" -gt 3 ]]; then
+            words[c]=${aliashash[${words[c]}]}
+            __%[1]s_handle_command
+        else
+            __%[1]s_handle_noun
+        fi
+    else
+        __%[1]s_handle_noun
+    fi
+    __%[1]s_handle_word
+}
+
+`, name))
+}
+
+func writePostscript(buf *bytes.Buffer, name string) {
+	name = strings.Replace(name, ":", "__", -1)
+	buf.WriteString(fmt.Sprintf("__start_%s()\n", name))
+	buf.WriteString(fmt.Sprintf(`{
+    local cur prev words cword
+    declare -A flaghash 2>/dev/null || :
+    declare -A aliashash 2>/dev/null || :
+    if declare -F _init_completion >/dev/null 2>&1; then
+        _init_completion -s || return
+    else
+        __%[1]s_init_completion -n "=" || return
+    fi
+
+    local c=0
+    local flags=()
+    local two_word_flags=()
+    local local_nonpersistent_flags=()
+    local flags_with_completion=()
+    local flags_completion=()
+    local commands=("%[1]s")
+    local must_have_one_flag=()
+    local must_have_one_noun=()
+    local last_command
+    local nouns=()
+
+    __%[1]s_handle_word
+}
+
+`, name))
+	buf.WriteString(fmt.Sprintf(`if [[ $(type -t compopt) = "builtin" ]]; then
+    complete -o default -F __start_%s %s
+else
+    complete -o default -o nospace -F __start_%s %s
+fi
+
+`, name, name, name, name))
+	buf.WriteString("# ex: ts=4 sw=4 et filetype=sh\n")
+}
+
+func writeCommands(buf *bytes.Buffer, cmd *Command) {
+	buf.WriteString("    commands=()\n")
+	for _, c := range cmd.Commands() {
+		if !c.IsAvailableCommand() || c == cmd.helpCommand {
+			continue
+		}
+		buf.WriteString(fmt.Sprintf("    commands+=(%q)\n", c.Name()))
+		writeCmdAliases(buf, c)
+	}
+	buf.WriteString("\n")
+}
+
+func writeFlagHandler(buf *bytes.Buffer, name string, annotations map[string][]string, cmd *Command) {
+	for key, value := range annotations {
+		switch key {
+		case BashCompFilenameExt:
+			buf.WriteString(fmt.Sprintf("    flags_with_completion+=(%q)\n", name))
+
+			var ext string
+			if len(value) > 0 {
+				ext = fmt.Sprintf("__%s_handle_filename_extension_flag ", cmd.Root().Name()) + strings.Join(value, "|")
+			} else {
+				ext = "_filedir"
+			}
+			buf.WriteString(fmt.Sprintf("    flags_completion+=(%q)\n", ext))
+		case BashCompCustom:
+			buf.WriteString(fmt.Sprintf("    flags_with_completion+=(%q)\n", name))
+			if len(value) > 0 {
+				handlers := strings.Join(value, "; ")
+				buf.WriteString(fmt.Sprintf("    flags_completion+=(%q)\n", handlers))
+			} else {
+				buf.WriteString("    flags_completion+=(:)\n")
+			}
+		case BashCompSubdirsInDir:
+			buf.WriteString(fmt.Sprintf("    flags_with_completion+=(%q)\n", name))
+
+			var ext string
+			if len(value) == 1 {
+				ext = fmt.Sprintf("__%s_handle_subdirs_in_dir_flag ", cmd.Root().Name()) + value[0]
+			} else {
+				ext = "_filedir -d"
+			}
+			buf.WriteString(fmt.Sprintf("    flags_completion+=(%q)\n", ext))
+		}
+	}
+}
+
+func writeShortFlag(buf *bytes.Buffer, flag *pflag.Flag, cmd *Command) {
+	name := flag.Shorthand
+	format := "    "
+	if len(flag.NoOptDefVal) == 0 {
+		format += "two_word_"
+	}
+	format += "flags+=(\"-%s\")\n"
+	buf.WriteString(fmt.Sprintf(format, name))
+	writeFlagHandler(buf, "-"+name, flag.Annotations, cmd)
+}
+
+func writeFlag(buf *bytes.Buffer, flag *pflag.Flag, cmd *Command) {
+	name := flag.Name
+	format := "    flags+=(\"--%s"
+	if len(flag.NoOptDefVal) == 0 {
+		format += "="
+	}
+	format += "\")\n"
+	buf.WriteString(fmt.Sprintf(format, name))
+	writeFlagHandler(buf, "--"+name, flag.Annotations, cmd)
+}
+
+func writeLocalNonPersistentFlag(buf *bytes.Buffer, flag *pflag.Flag) {
+	name := flag.Name
+	format := "    local_nonpersistent_flags+=(\"--%s"
+	if len(flag.NoOptDefVal) == 0 {
+		format += "="
+	}
+	format += "\")\n"
+	buf.WriteString(fmt.Sprintf(format, name))
+}
+
+func writeFlags(buf *bytes.Buffer, cmd *Command) {
+	buf.WriteString(`    flags=()
+    two_word_flags=()
+    local_nonpersistent_flags=()
+    flags_with_completion=()
+    flags_completion=()
+
+`)
+	localNonPersistentFlags := cmd.LocalNonPersistentFlags()
+	cmd.NonInheritedFlags().VisitAll(func(flag *pflag.Flag) {
+		if nonCompletableFlag(flag) {
+			return
+		}
+		writeFlag(buf, flag, cmd)
+		if len(flag.Shorthand) > 0 {
+			writeShortFlag(buf, flag, cmd)
+		}
+		if localNonPersistentFlags.Lookup(flag.Name) != nil {
+			writeLocalNonPersistentFlag(buf, flag)
+		}
+	})
+	cmd.InheritedFlags().VisitAll(func(flag *pflag.Flag) {
+		if nonCompletableFlag(flag) {
+			return
+		}
+		writeFlag(buf, flag, cmd)
+		if len(flag.Shorthand) > 0 {
+			writeShortFlag(buf, flag, cmd)
+		}
+	})
+
+	buf.WriteString("\n")
+}
+
+func writeRequiredFlag(buf *bytes.Buffer, cmd *Command) {
+	buf.WriteString("    must_have_one_flag=()\n")
+	flags := cmd.NonInheritedFlags()
+	flags.VisitAll(func(flag *pflag.Flag) {
+		if nonCompletableFlag(flag) {
+			return
+		}
+		for key := range flag.Annotations {
+			switch key {
+			case BashCompOneRequiredFlag:
+				format := "    must_have_one_flag+=(\"--%s"
+				if flag.Value.Type() != "bool" {
+					format += "="
+				}
+				format += "\")\n"
+				buf.WriteString(fmt.Sprintf(format, flag.Name))
+
+				if len(flag.Shorthand) > 0 {
+					buf.WriteString(fmt.Sprintf("    must_have_one_flag+=(\"-%s\")\n", flag.Shorthand))
+				}
+			}
+		}
+	})
+}
+
+func writeRequiredNouns(buf *bytes.Buffer, cmd *Command) {
+	buf.WriteString("    must_have_one_noun=()\n")
+	sort.Sort(sort.StringSlice(cmd.ValidArgs))
+	for _, value := range cmd.ValidArgs {
+		buf.WriteString(fmt.Sprintf("    must_have_one_noun+=(%q)\n", value))
+	}
+}
+
+func writeCmdAliases(buf *bytes.Buffer, cmd *Command) {
+	if len(cmd.Aliases) == 0 {
+		return
+	}
+
+	sort.Sort(sort.StringSlice(cmd.Aliases))
+
+	buf.WriteString(fmt.Sprint(`    if [[ -z "${BASH_VERSION}" || "${BASH_VERSINFO[0]}" -gt 3 ]]; then`, "\n"))
+	for _, value := range cmd.Aliases {
+		buf.WriteString(fmt.Sprintf("        command_aliases+=(%q)\n", value))
+		buf.WriteString(fmt.Sprintf("        aliashash[%q]=%q\n", value, cmd.Name()))
+	}
+	buf.WriteString(`    fi`)
+	buf.WriteString("\n")
+}
+func writeArgAliases(buf *bytes.Buffer, cmd *Command) {
+	buf.WriteString("    noun_aliases=()\n")
+	sort.Sort(sort.StringSlice(cmd.ArgAliases))
+	for _, value := range cmd.ArgAliases {
+		buf.WriteString(fmt.Sprintf("    noun_aliases+=(%q)\n", value))
+	}
+}
+
+func gen(buf *bytes.Buffer, cmd *Command) {
+	for _, c := range cmd.Commands() {
+		if !c.IsAvailableCommand() || c == cmd.helpCommand {
+			continue
+		}
+		gen(buf, c)
+	}
+	commandName := cmd.CommandPath()
+	commandName = strings.Replace(commandName, " ", "_", -1)
+	commandName = strings.Replace(commandName, ":", "__", -1)
+
+	if cmd.Root() == cmd {
+		buf.WriteString(fmt.Sprintf("_%s_root_command()\n{\n", commandName))
+	} else {
+		buf.WriteString(fmt.Sprintf("_%s()\n{\n", commandName))
+	}
+
+	buf.WriteString(fmt.Sprintf("    last_command=%q\n", commandName))
+	buf.WriteString("\n")
+	buf.WriteString("    command_aliases=()\n")
+	buf.WriteString("\n")
+
+	writeCommands(buf, cmd)
+	writeFlags(buf, cmd)
+	writeRequiredFlag(buf, cmd)
+	writeRequiredNouns(buf, cmd)
+	writeArgAliases(buf, cmd)
+	buf.WriteString("}\n\n")
+}
+
+// GenBashCompletion generates bash completion file and writes to the passed writer.
+func (c *Command) GenBashCompletion(w io.Writer) error {
+	buf := new(bytes.Buffer)
+	writePreamble(buf, c.Name())
+	if len(c.BashCompletionFunction) > 0 {
+		buf.WriteString(c.BashCompletionFunction + "\n")
+	}
+	gen(buf, c)
+	writePostscript(buf, c.Name())
+
+	_, err := buf.WriteTo(w)
+	return err
+}
+
+func nonCompletableFlag(flag *pflag.Flag) bool {
+	return flag.Hidden || len(flag.Deprecated) > 0
+}
+
+// GenBashCompletionFile generates bash completion file.
+func (c *Command) GenBashCompletionFile(filename string) error {
+	outFile, err := os.Create(filename)
+	if err != nil {
+		return err
+	}
+	defer outFile.Close()
+
+	return c.GenBashCompletion(outFile)
+}
+
+// MarkFlagRequired adds the BashCompOneRequiredFlag annotation to the named flag if it exists,
+// and causes your command to report an error if invoked without the flag.
+func (c *Command) MarkFlagRequired(name string) error {
+	return MarkFlagRequired(c.Flags(), name)
+}
+
+// MarkPersistentFlagRequired adds the BashCompOneRequiredFlag annotation to the named persistent flag if it exists,
+// and causes your command to report an error if invoked without the flag.
+func (c *Command) MarkPersistentFlagRequired(name string) error {
+	return MarkFlagRequired(c.PersistentFlags(), name)
+}
+
+// MarkFlagRequired adds the BashCompOneRequiredFlag annotation to the named flag if it exists,
+// and causes your command to report an error if invoked without the flag.
+func MarkFlagRequired(flags *pflag.FlagSet, name string) error {
+	return flags.SetAnnotation(name, BashCompOneRequiredFlag, []string{"true"})
+}
+
+// MarkFlagFilename adds the BashCompFilenameExt annotation to the named flag, if it exists.
+// Generated bash autocompletion will select filenames for the flag, limiting to named extensions if provided.
+func (c *Command) MarkFlagFilename(name string, extensions ...string) error {
+	return MarkFlagFilename(c.Flags(), name, extensions...)
+}
+
+// MarkFlagCustom adds the BashCompCustom annotation to the named flag, if it exists.
+// Generated bash autocompletion will call the bash function f for the flag.
+func (c *Command) MarkFlagCustom(name string, f string) error {
+	return MarkFlagCustom(c.Flags(), name, f)
+}
+
+// MarkPersistentFlagFilename adds the BashCompFilenameExt annotation to the named persistent flag, if it exists.
+// Generated bash autocompletion will select filenames for the flag, limiting to named extensions if provided.
+func (c *Command) MarkPersistentFlagFilename(name string, extensions ...string) error {
+	return MarkFlagFilename(c.PersistentFlags(), name, extensions...)
+}
+
+// MarkFlagFilename adds the BashCompFilenameExt annotation to the named flag in the flag set, if it exists.
+// Generated bash autocompletion will select filenames for the flag, limiting to named extensions if provided.
+func MarkFlagFilename(flags *pflag.FlagSet, name string, extensions ...string) error {
+	return flags.SetAnnotation(name, BashCompFilenameExt, extensions)
+}
+
+// MarkFlagCustom adds the BashCompCustom annotation to the named flag in the flag set, if it exists.
+// Generated bash autocompletion will call the bash function f for the flag.
+func MarkFlagCustom(flags *pflag.FlagSet, name string, f string) error {
+	return flags.SetAnnotation(name, BashCompCustom, []string{f})
+}