diff --git a/vendor/google.golang.org/protobuf/proto/encode_gen.go b/vendor/google.golang.org/protobuf/proto/encode_gen.go
new file mode 100644
index 0000000..185dacf
--- /dev/null
+++ b/vendor/google.golang.org/protobuf/proto/encode_gen.go
@@ -0,0 +1,97 @@
+// 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.
+
+// Code generated by generate-types. DO NOT EDIT.
+
+package proto
+
+import (
+	"math"
+	"unicode/utf8"
+
+	"google.golang.org/protobuf/encoding/protowire"
+	"google.golang.org/protobuf/internal/errors"
+	"google.golang.org/protobuf/internal/strs"
+	"google.golang.org/protobuf/reflect/protoreflect"
+)
+
+var wireTypes = map[protoreflect.Kind]protowire.Type{
+	protoreflect.BoolKind:     protowire.VarintType,
+	protoreflect.EnumKind:     protowire.VarintType,
+	protoreflect.Int32Kind:    protowire.VarintType,
+	protoreflect.Sint32Kind:   protowire.VarintType,
+	protoreflect.Uint32Kind:   protowire.VarintType,
+	protoreflect.Int64Kind:    protowire.VarintType,
+	protoreflect.Sint64Kind:   protowire.VarintType,
+	protoreflect.Uint64Kind:   protowire.VarintType,
+	protoreflect.Sfixed32Kind: protowire.Fixed32Type,
+	protoreflect.Fixed32Kind:  protowire.Fixed32Type,
+	protoreflect.FloatKind:    protowire.Fixed32Type,
+	protoreflect.Sfixed64Kind: protowire.Fixed64Type,
+	protoreflect.Fixed64Kind:  protowire.Fixed64Type,
+	protoreflect.DoubleKind:   protowire.Fixed64Type,
+	protoreflect.StringKind:   protowire.BytesType,
+	protoreflect.BytesKind:    protowire.BytesType,
+	protoreflect.MessageKind:  protowire.BytesType,
+	protoreflect.GroupKind:    protowire.StartGroupType,
+}
+
+func (o MarshalOptions) marshalSingular(b []byte, fd protoreflect.FieldDescriptor, v protoreflect.Value) ([]byte, error) {
+	switch fd.Kind() {
+	case protoreflect.BoolKind:
+		b = protowire.AppendVarint(b, protowire.EncodeBool(v.Bool()))
+	case protoreflect.EnumKind:
+		b = protowire.AppendVarint(b, uint64(v.Enum()))
+	case protoreflect.Int32Kind:
+		b = protowire.AppendVarint(b, uint64(int32(v.Int())))
+	case protoreflect.Sint32Kind:
+		b = protowire.AppendVarint(b, protowire.EncodeZigZag(int64(int32(v.Int()))))
+	case protoreflect.Uint32Kind:
+		b = protowire.AppendVarint(b, uint64(uint32(v.Uint())))
+	case protoreflect.Int64Kind:
+		b = protowire.AppendVarint(b, uint64(v.Int()))
+	case protoreflect.Sint64Kind:
+		b = protowire.AppendVarint(b, protowire.EncodeZigZag(v.Int()))
+	case protoreflect.Uint64Kind:
+		b = protowire.AppendVarint(b, v.Uint())
+	case protoreflect.Sfixed32Kind:
+		b = protowire.AppendFixed32(b, uint32(v.Int()))
+	case protoreflect.Fixed32Kind:
+		b = protowire.AppendFixed32(b, uint32(v.Uint()))
+	case protoreflect.FloatKind:
+		b = protowire.AppendFixed32(b, math.Float32bits(float32(v.Float())))
+	case protoreflect.Sfixed64Kind:
+		b = protowire.AppendFixed64(b, uint64(v.Int()))
+	case protoreflect.Fixed64Kind:
+		b = protowire.AppendFixed64(b, v.Uint())
+	case protoreflect.DoubleKind:
+		b = protowire.AppendFixed64(b, math.Float64bits(v.Float()))
+	case protoreflect.StringKind:
+		if strs.EnforceUTF8(fd) && !utf8.ValidString(v.String()) {
+			return b, errors.InvalidUTF8(string(fd.FullName()))
+		}
+		b = protowire.AppendString(b, v.String())
+	case protoreflect.BytesKind:
+		b = protowire.AppendBytes(b, v.Bytes())
+	case protoreflect.MessageKind:
+		var pos int
+		var err error
+		b, pos = appendSpeculativeLength(b)
+		b, err = o.marshalMessage(b, v.Message())
+		if err != nil {
+			return b, err
+		}
+		b = finishSpeculativeLength(b, pos)
+	case protoreflect.GroupKind:
+		var err error
+		b, err = o.marshalMessage(b, v.Message())
+		if err != nil {
+			return b, err
+		}
+		b = protowire.AppendVarint(b, protowire.EncodeTag(fd.Number(), protowire.EndGroupType))
+	default:
+		return b, errors.New("invalid kind %v", fd.Kind())
+	}
+	return b, nil
+}