feat(aws): support lambda (#334)

vendor/github.com/aws/aws-lambda-go/lambda/messages/messages.go

@@ -0,0 +1,43 @@
+// Copyright 2017 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+
+package messages
+
+type PingRequest struct {
+}
+
+type PingResponse struct {
+}
+
+type InvokeRequest_Timestamp struct {
+	Seconds int64
+	Nanos   int64
+}
+
+type InvokeRequest struct {
+	Payload               []byte
+	RequestId             string
+	XAmznTraceId          string
+	Deadline              InvokeRequest_Timestamp
+	InvokedFunctionArn    string
+	CognitoIdentityId     string
+	CognitoIdentityPoolId string
+	ClientContext         []byte
+}
+
+type InvokeResponse struct {
+	Payload []byte
+	Error   *InvokeResponse_Error
+}
+
+type InvokeResponse_Error struct {
+	Message    string
+	Type       string
+	StackTrace []*InvokeResponse_Error_StackFrame
+	ShouldExit bool
+}
+
+type InvokeResponse_Error_StackFrame struct {
+	Path  string `json:"path"`
+	Line  int32  `json:"line"`
+	Label string `json:"label"`
+}