Bumping k8s dependencies to 1.13

vendor/github.com/golang/protobuf/README.md

@@ -1,4 +1,4 @@
-# Go support for Protocol Buffers
+# Go support for Protocol Buffers - Google's data interchange format
 
 [![Build Status](https://travis-ci.org/golang/protobuf.svg?branch=master)](https://travis-ci.org/golang/protobuf)
 [![GoDoc](https://godoc.org/github.com/golang/protobuf?status.svg)](https://godoc.org/github.com/golang/protobuf)
@@ -83,15 +83,19 @@ be:
 
 - Relative to the import path:
 
-	protoc --go_out=. inputs/x.proto
-	# writes ./github.com/golang/protobuf/p/x.pb.go
+```shell
+  protoc --go_out=. inputs/x.proto
+  # writes ./github.com/golang/protobuf/p/x.pb.go
+```
 
   (This can work well with `--go_out=$GOPATH`.)
 
 - Relative to the input file:
 
-	protoc --go_out=paths=source_relative:. inputs/x.proto
-	# generate ./inputs/x.pb.go
+```shell
+protoc --go_out=paths=source_relative:. inputs/x.proto
+# generate ./inputs/x.pb.go
+```
 
 ## Generated code ##
 
@@ -157,9 +161,6 @@ Consider file test.proto, containing
 	  required string label = 1;
 	  optional int32 type = 2 [default=77];
 	  repeated int64 reps = 3;
-	  optional group OptionalGroup = 4 {
-	    required string RequiredField = 5;
-	  }
 	}
 ```
 
@@ -176,13 +177,10 @@ To create and play with a Test object from the example package,
 	)
 
 	func main() {
-		test := &example.Test {
+		test := &example.Test{
 			Label: proto.String("hello"),
 			Type:  proto.Int32(17),
 			Reps:  []int64{1, 2, 3},
-			Optionalgroup: &example.Test_OptionalGroup {
-				RequiredField: proto.String("good bye"),
-			},
 		}
 		data, err := proto.Marshal(test)
 		if err != nil {