Update grpc-web dependency

Gopkg.toml

@@ -16,8 +16,8 @@ required = [
   name = "github.com/golang/protobuf"
 
 [[constraint]]
-  branch = "master"
   name = "github.com/improbable-eng/grpc-web"
+  version = "0.5.0"
 
 [[constraint]]
   branch = "master"

grpcweb/grpcwebjs/.gitignore

@@ -1 +1,2 @@
 node_modules
+package-lock.json

grpcweb/invoke.go

@@ -73,8 +73,8 @@ func invoke(
 	request := js.Global.Get("grpc").Call("invoke", methodDesc, props)
 
 	cancelFunc := func() {
-		// https://github.com/improbable-eng/grpc-web/blob/0ab7201b53447db59d63ff3a95173e565baae10a/ts/src/grpc.ts#L310
-		request.Call("abort")
+		// https://github.com/improbable-eng/grpc-web/blob/eb398c2f9233171176ceebb2353148224a0e58a0/ts/src/invoke.ts#L50
+		request.Call("close")
 	}
 
 	return cancelFunc, nil

grpcweb/metadata/metadata.go

@@ -31,14 +31,14 @@ import (
 // Metadata encasulates the Improbable Metadata.
 type Metadata struct {
 	*js.Object
-	MD metadata.MD `js:"keyValueMap"`
+	MD metadata.MD `js:"headersMap"`
 }
 
 // New initializes and populates a new Metadata.
 func New(md metadata.MD) *Metadata {
-	b := &Metadata{
-		Object: js.Global.Get("Metadata").New(),
+	m := &Metadata{
+		Object: js.Global.Get("grpc").Get("Metadata").New(),
 	}
-	b.MD = md
-	return b
+	m.MD = md
+	return m
 }

test/server/main.go

@@ -74,7 +74,7 @@ func main() {
 		Handler: http.HandlerFunc(emptyHandler),
 	}
 
-	grpclog.Printf("Starting servers.")
+	grpclog.Printf("Starting servers")
 
 	// Start the empty Http1.1 server
 	go func() {
@@ -109,6 +109,7 @@ func main() {
 		Addr:    shared.GopherJSServer,
 		Handler: http.FileServer(http.Dir("./client/html")),
 	}
+	grpclog.Printf("Serving tests on https://localhost:8080")
 	if err := httpsSrv.ListenAndServeTLS("./insecure/localhost.crt", "./insecure/localhost.key"); err != nil {
 		grpclog.Fatalf("failed to start JS server: %v", err)
 	}