diff --git a/vendor/github.com/golang/protobuf/proto/deprecated.go b/vendor/github.com/golang/protobuf/proto/deprecated.go
new file mode 100644
index 0000000..e8db57e
--- /dev/null
+++ b/vendor/github.com/golang/protobuf/proto/deprecated.go
@@ -0,0 +1,113 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package proto
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"strconv"
+
+	protoV2 "google.golang.org/protobuf/proto"
+)
+
+var (
+	// Deprecated: No longer returned.
+	ErrNil = errors.New("proto: Marshal called with nil")
+
+	// Deprecated: No longer returned.
+	ErrTooLarge = errors.New("proto: message encodes to over 2 GB")
+
+	// Deprecated: No longer returned.
+	ErrInternalBadWireType = errors.New("proto: internal error: bad wiretype for oneof")
+)
+
+// Deprecated: Do not use.
+type Stats struct{ Emalloc, Dmalloc, Encode, Decode, Chit, Cmiss, Size uint64 }
+
+// Deprecated: Do not use.
+func GetStats() Stats { return Stats{} }
+
+// Deprecated: Do not use.
+func MarshalMessageSet(interface{}) ([]byte, error) {
+	return nil, errors.New("proto: not implemented")
+}
+
+// Deprecated: Do not use.
+func UnmarshalMessageSet([]byte, interface{}) error {
+	return errors.New("proto: not implemented")
+}
+
+// Deprecated: Do not use.
+func MarshalMessageSetJSON(interface{}) ([]byte, error) {
+	return nil, errors.New("proto: not implemented")
+}
+
+// Deprecated: Do not use.
+func UnmarshalMessageSetJSON([]byte, interface{}) error {
+	return errors.New("proto: not implemented")
+}
+
+// Deprecated: Do not use.
+func RegisterMessageSetType(Message, int32, string) {}
+
+// Deprecated: Do not use.
+func EnumName(m map[int32]string, v int32) string {
+	s, ok := m[v]
+	if ok {
+		return s
+	}
+	return strconv.Itoa(int(v))
+}
+
+// Deprecated: Do not use.
+func UnmarshalJSONEnum(m map[string]int32, data []byte, enumName string) (int32, error) {
+	if data[0] == '"' {
+		// New style: enums are strings.
+		var repr string
+		if err := json.Unmarshal(data, &repr); err != nil {
+			return -1, err
+		}
+		val, ok := m[repr]
+		if !ok {
+			return 0, fmt.Errorf("unrecognized enum %s value %q", enumName, repr)
+		}
+		return val, nil
+	}
+	// Old style: enums are ints.
+	var val int32
+	if err := json.Unmarshal(data, &val); err != nil {
+		return 0, fmt.Errorf("cannot unmarshal %#q into enum %s", data, enumName)
+	}
+	return val, nil
+}
+
+// Deprecated: Do not use; this type existed for intenal-use only.
+type InternalMessageInfo struct{}
+
+// Deprecated: Do not use; this method existed for intenal-use only.
+func (*InternalMessageInfo) DiscardUnknown(m Message) {
+	DiscardUnknown(m)
+}
+
+// Deprecated: Do not use; this method existed for intenal-use only.
+func (*InternalMessageInfo) Marshal(b []byte, m Message, deterministic bool) ([]byte, error) {
+	return protoV2.MarshalOptions{Deterministic: deterministic}.MarshalAppend(b, MessageV2(m))
+}
+
+// Deprecated: Do not use; this method existed for intenal-use only.
+func (*InternalMessageInfo) Merge(dst, src Message) {
+	protoV2.Merge(MessageV2(dst), MessageV2(src))
+}
+
+// Deprecated: Do not use; this method existed for intenal-use only.
+func (*InternalMessageInfo) Size(m Message) int {
+	return protoV2.Size(MessageV2(m))
+}
+
+// Deprecated: Do not use; this method existed for intenal-use only.
+func (*InternalMessageInfo) Unmarshal(m Message, b []byte) error {
+	return protoV2.UnmarshalOptions{Merge: true}.Unmarshal(b, MessageV2(m))
+}