[gopls-release-branch.0.3] gopls: update go.mod for gopls/v0.3.2-pre2

Change-Id: I7e1f302d661d2e535320007e55d6b769c899d693
Reviewed-on: https://go-review.googlesource.com/c/tools/+/219224
Reviewed-by: Heschi Kreinick <heschi@google.com>

gopls/go.mod

diff --git a/gopls/go.mod b/gopls/go.mod
index 3319140..8496bca 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 v0.0.0-20200212163411-3b28f2c8d10f
+	golang.org/x/tools v0.0.0-20200212213342-7a21e308cf6c
 	honnef.co/go/tools v0.0.1-2019.2.3
 	mvdan.cc/xurls/v2 v2.1.0
 )