gopls: update go.mod for golang.org/x/tools for v0.2.0 release

Change-Id: I971945e456257c52ac52a99337375c5de6722894
Reviewed-on: https://go-review.googlesource.com/c/tools/+/206438
Reviewed-by: Heschi Kreinick <heschi@google.com>
diff --git a/gopls/go.mod b/gopls/go.mod
index d4396a3..1344663 100644
--- a/gopls/go.mod
+++ b/gopls/go.mod
@@ -5,7 +5,7 @@
 require (
 	github.com/sergi/go-diff v1.0.0
 	github.com/stretchr/testify v1.4.0 // indirect
-	golang.org/x/tools v0.0.0-20191105003958-c33799150868
+	golang.org/x/tools v0.0.0-20191108194844-46f05828f2fe
 	honnef.co/go/tools v0.0.1-2019.2.3
 )