Update go dependencies

vendor/golang.org/x/net/http2/go111.go

@@ -6,6 +6,8 @@
 
 package http2
 
+import "net/textproto"
+
 func traceHasWroteHeaderField(trace *clientTrace) bool {
 	return trace != nil && trace.WroteHeaderField != nil
 }
@@ -15,3 +17,10 @@ func traceWroteHeaderField(trace *clientTrace, k, v string) {
 		trace.WroteHeaderField(k, []string{v})
 	}
 }
+
+func traceGot1xxResponseFunc(trace *clientTrace) func(int, textproto.MIMEHeader) error {
+	if trace != nil {
+		return trace.Got1xxResponse
+	}
+	return nil
+}