Update go dependencies

vendor/github.com/gogo/protobuf/Makefile

@@ -58,14 +58,13 @@ gofmt:
 	gofmt -l -s -w .
 
 regenerate:
-	make -C protoc-gen-gogo/descriptor regenerate
-	make -C protoc-gen-gogo/plugin regenerate
-	make -C protoc-gen-gogo/testdata regenerate
+	make -C protoc-gen-gogo regenerate
 	make -C gogoproto regenerate
-	make -C proto/testdata regenerate
+	make -C proto/test_proto regenerate
+	make -C proto/proto3_proto regenerate
 	make -C jsonpb/jsonpb_test_proto regenerate
-	make -C _conformance regenerate
-	make -C types regenerate
+	make -C conformance regenerate
+	make -C protobuf regenerate
 	make -C test regenerate
 	make -C test/example regenerate
 	make -C test/unrecognized regenerate
@@ -118,6 +117,10 @@ regenerate:
 	make -C test/int64support regenerate
 	make -C test/issue322 regenerate
 	make -C test/issue330 regenerate
+	make -C test/importcustom-issue389 regenerate
+	make -C test/merge regenerate
+	make -C test/cachedsize regenerate
+	make -C test/deterministic regenerate
 	make gofmt
 
 tests:
@@ -139,9 +142,11 @@ drone:
 
 testall:
 	go get -u github.com/golang/protobuf/proto
-	make -C protoc-gen-gogo/testdata test
+	make -C protoc-gen-gogo test
 	make -C vanity/test test
 	make -C test/registration test
+	make -C conformance test
+	make -C test/issue427 test
 	make tests
 
 bench:
@@ -153,7 +158,7 @@ contributors:
 	git log --format='%aN <%aE>' | sort -fu > CONTRIBUTORS
 
 js:
-ifeq (go1.9, $(findstring go1.9, $(GO_VERSION)))
+ifeq (go1.10, $(findstring go1.10, $(GO_VERSION)))
 	go get -u github.com/gopherjs/gopherjs
 	gopherjs build github.com/gogo/protobuf/protoc-gen-gogo
 endif