diff --git a/vendor/github.com/jhump/protoreflect/desc/internal/util.go b/vendor/github.com/jhump/protoreflect/desc/internal/util.go
new file mode 100644
index 0000000..71855bf
--- /dev/null
+++ b/vendor/github.com/jhump/protoreflect/desc/internal/util.go
@@ -0,0 +1,291 @@
+package internal
+
+import (
+	"math"
+	"unicode"
+	"unicode/utf8"
+)
+
+const (
+	// MaxNormalTag is the maximum allowed tag number for a field in a normal message.
+	MaxNormalTag = 536870911 // 2^29 - 1
+
+	// MaxMessageSetTag is the maximum allowed tag number of a field in a message that
+	// uses the message set wire format.
+	MaxMessageSetTag = math.MaxInt32 - 1
+
+	// MaxTag is the maximum allowed tag number. (It is the same as MaxMessageSetTag
+	// since that is the absolute highest allowed.)
+	MaxTag = MaxMessageSetTag
+
+	// SpecialReservedStart is the first tag in a range that is reserved and not
+	// allowed for use in message definitions.
+	SpecialReservedStart = 19000
+	// SpecialReservedEnd is the last tag in a range that is reserved and not
+	// allowed for use in message definitions.
+	SpecialReservedEnd = 19999
+
+	// NB: It would be nice to use constants from generated code instead of
+	// hard-coding these here. But code-gen does not emit these as constants
+	// anywhere. The only places they appear in generated code are struct tags
+	// on fields of the generated descriptor protos.
+
+	// File_packageTag is the tag number of the package element in a file
+	// descriptor proto.
+	File_packageTag = 2
+	// File_dependencyTag is the tag number of the dependencies element in a
+	// file descriptor proto.
+	File_dependencyTag = 3
+	// File_messagesTag is the tag number of the messages element in a file
+	// descriptor proto.
+	File_messagesTag = 4
+	// File_enumsTag is the tag number of the enums element in a file descriptor
+	// proto.
+	File_enumsTag = 5
+	// File_servicesTag is the tag number of the services element in a file
+	// descriptor proto.
+	File_servicesTag = 6
+	// File_extensionsTag is the tag number of the extensions element in a file
+	// descriptor proto.
+	File_extensionsTag = 7
+	// File_optionsTag is the tag number of the options element in a file
+	// descriptor proto.
+	File_optionsTag = 8
+	// File_syntaxTag is the tag number of the syntax element in a file
+	// descriptor proto.
+	File_syntaxTag = 12
+	// Message_nameTag is the tag number of the name element in a message
+	// descriptor proto.
+	Message_nameTag = 1
+	// Message_fieldsTag is the tag number of the fields element in a message
+	// descriptor proto.
+	Message_fieldsTag = 2
+	// Message_nestedMessagesTag is the tag number of the nested messages
+	// element in a message descriptor proto.
+	Message_nestedMessagesTag = 3
+	// Message_enumsTag is the tag number of the enums element in a message
+	// descriptor proto.
+	Message_enumsTag = 4
+	// Message_extensionRangeTag is the tag number of the extension ranges
+	// element in a message descriptor proto.
+	Message_extensionRangeTag = 5
+	// Message_extensionsTag is the tag number of the extensions element in a
+	// message descriptor proto.
+	Message_extensionsTag = 6
+	// Message_optionsTag is the tag number of the options element in a message
+	// descriptor proto.
+	Message_optionsTag = 7
+	// Message_oneOfsTag is the tag number of the one-ofs element in a message
+	// descriptor proto.
+	Message_oneOfsTag = 8
+	// Message_reservedRangeTag is the tag number of the reserved ranges element
+	// in a message descriptor proto.
+	Message_reservedRangeTag = 9
+	// Message_reservedNameTag is the tag number of the reserved names element
+	// in a message descriptor proto.
+	Message_reservedNameTag = 10
+	// ExtensionRange_startTag is the tag number of the start index in an
+	// extension range proto.
+	ExtensionRange_startTag = 1
+	// ExtensionRange_endTag is the tag number of the end index in an
+	// extension range proto.
+	ExtensionRange_endTag = 2
+	// ExtensionRange_optionsTag is the tag number of the options element in an
+	// extension range proto.
+	ExtensionRange_optionsTag = 3
+	// ReservedRange_startTag is the tag number of the start index in a reserved
+	// range proto.
+	ReservedRange_startTag = 1
+	// ReservedRange_endTag is the tag number of the end index in a reserved
+	// range proto.
+	ReservedRange_endTag = 2
+	// Field_nameTag is the tag number of the name element in a field descriptor
+	// proto.
+	Field_nameTag = 1
+	// Field_extendeeTag is the tag number of the extendee element in a field
+	// descriptor proto.
+	Field_extendeeTag = 2
+	// Field_numberTag is the tag number of the number element in a field
+	// descriptor proto.
+	Field_numberTag = 3
+	// Field_labelTag is the tag number of the label element in a field
+	// descriptor proto.
+	Field_labelTag = 4
+	// Field_typeTag is the tag number of the type element in a field descriptor
+	// proto.
+	Field_typeTag = 5
+	// Field_typeNameTag is the tag number of the type name element in a field
+	// descriptor proto.
+	Field_typeNameTag = 6
+	// Field_defaultTag is the tag number of the default value element in a
+	// field descriptor proto.
+	Field_defaultTag = 7
+	// Field_optionsTag is the tag number of the options element in a field
+	// descriptor proto.
+	Field_optionsTag = 8
+	// Field_jsonNameTag is the tag number of the JSON name element in a field
+	// descriptor proto.
+	Field_jsonNameTag = 10
+	// Field_proto3OptionalTag is the tag number of the proto3_optional element
+	// in a descriptor proto.
+	Field_proto3OptionalTag = 17
+	// OneOf_nameTag is the tag number of the name element in a one-of
+	// descriptor proto.
+	OneOf_nameTag = 1
+	// OneOf_optionsTag is the tag number of the options element in a one-of
+	// descriptor proto.
+	OneOf_optionsTag = 2
+	// Enum_nameTag is the tag number of the name element in an enum descriptor
+	// proto.
+	Enum_nameTag = 1
+	// Enum_valuesTag is the tag number of the values element in an enum
+	// descriptor proto.
+	Enum_valuesTag = 2
+	// Enum_optionsTag is the tag number of the options element in an enum
+	// descriptor proto.
+	Enum_optionsTag = 3
+	// Enum_reservedRangeTag is the tag number of the reserved ranges element in
+	// an enum descriptor proto.
+	Enum_reservedRangeTag = 4
+	// Enum_reservedNameTag is the tag number of the reserved names element in
+	// an enum descriptor proto.
+	Enum_reservedNameTag = 5
+	// EnumVal_nameTag is the tag number of the name element in an enum value
+	// descriptor proto.
+	EnumVal_nameTag = 1
+	// EnumVal_numberTag is the tag number of the number element in an enum
+	// value descriptor proto.
+	EnumVal_numberTag = 2
+	// EnumVal_optionsTag is the tag number of the options element in an enum
+	// value descriptor proto.
+	EnumVal_optionsTag = 3
+	// Service_nameTag is the tag number of the name element in a service
+	// descriptor proto.
+	Service_nameTag = 1
+	// Service_methodsTag is the tag number of the methods element in a service
+	// descriptor proto.
+	Service_methodsTag = 2
+	// Service_optionsTag is the tag number of the options element in a service
+	// descriptor proto.
+	Service_optionsTag = 3
+	// Method_nameTag is the tag number of the name element in a method
+	// descriptor proto.
+	Method_nameTag = 1
+	// Method_inputTag is the tag number of the input type element in a method
+	// descriptor proto.
+	Method_inputTag = 2
+	// Method_outputTag is the tag number of the output type element in a method
+	// descriptor proto.
+	Method_outputTag = 3
+	// Method_optionsTag is the tag number of the options element in a method
+	// descriptor proto.
+	Method_optionsTag = 4
+	// Method_inputStreamTag is the tag number of the input stream flag in a
+	// method descriptor proto.
+	Method_inputStreamTag = 5
+	// Method_outputStreamTag is the tag number of the output stream flag in a
+	// method descriptor proto.
+	Method_outputStreamTag = 6
+
+	// UninterpretedOptionsTag is the tag number of the uninterpreted options
+	// element. All *Options messages use the same tag for the field that stores
+	// uninterpreted options.
+	UninterpretedOptionsTag = 999
+
+	// Uninterpreted_nameTag is the tag number of the name element in an
+	// uninterpreted options proto.
+	Uninterpreted_nameTag = 2
+	// Uninterpreted_identTag is the tag number of the identifier value in an
+	// uninterpreted options proto.
+	Uninterpreted_identTag = 3
+	// Uninterpreted_posIntTag is the tag number of the positive int value in an
+	// uninterpreted options proto.
+	Uninterpreted_posIntTag = 4
+	// Uninterpreted_negIntTag is the tag number of the negative int value in an
+	// uninterpreted options proto.
+	Uninterpreted_negIntTag = 5
+	// Uninterpreted_doubleTag is the tag number of the double value in an
+	// uninterpreted options proto.
+	Uninterpreted_doubleTag = 6
+	// Uninterpreted_stringTag is the tag number of the string value in an
+	// uninterpreted options proto.
+	Uninterpreted_stringTag = 7
+	// Uninterpreted_aggregateTag is the tag number of the aggregate value in an
+	// uninterpreted options proto.
+	Uninterpreted_aggregateTag = 8
+	// UninterpretedName_nameTag is the tag number of the name element in an
+	// uninterpreted option name proto.
+	UninterpretedName_nameTag = 1
+)
+
+// JsonName returns the default JSON name for a field with the given name.
+func JsonName(name string) string {
+	var js []rune
+	nextUpper := false
+	for i, r := range name {
+		if r == '_' {
+			nextUpper = true
+			continue
+		}
+		if i == 0 {
+			js = append(js, r)
+		} else if nextUpper {
+			nextUpper = false
+			js = append(js, unicode.ToUpper(r))
+		} else {
+			js = append(js, r)
+		}
+	}
+	return string(js)
+}
+
+// InitCap returns the given field name, but with the first letter capitalized.
+func InitCap(name string) string {
+	r, sz := utf8.DecodeRuneInString(name)
+	return string(unicode.ToUpper(r)) + name[sz:]
+}
+
+// CreatePrefixList returns a list of package prefixes to search when resolving
+// a symbol name. If the given package is blank, it returns only the empty
+// string. If the given package contains only one token, e.g. "foo", it returns
+// that token and the empty string, e.g. ["foo", ""]. Otherwise, it returns
+// successively shorter prefixes of the package and then the empty string. For
+// example, for a package named "foo.bar.baz" it will return the following list:
+//   ["foo.bar.baz", "foo.bar", "foo", ""]
+func CreatePrefixList(pkg string) []string {
+	if pkg == "" {
+		return []string{""}
+	}
+
+	numDots := 0
+	// one pass to pre-allocate the returned slice
+	for i := 0; i < len(pkg); i++ {
+		if pkg[i] == '.' {
+			numDots++
+		}
+	}
+	if numDots == 0 {
+		return []string{pkg, ""}
+	}
+
+	prefixes := make([]string, numDots+2)
+	// second pass to fill in returned slice
+	for i := 0; i < len(pkg); i++ {
+		if pkg[i] == '.' {
+			prefixes[numDots] = pkg[:i]
+			numDots--
+		}
+	}
+	prefixes[0] = pkg
+
+	return prefixes
+}
+
+// GetMaxTag returns the max tag number allowed, based on whether a message uses
+// message set wire format or not.
+func GetMaxTag(isMessageSet bool) int32 {
+	if isMessageSet {
+		return MaxMessageSetTag
+	}
+	return MaxNormalTag
+}