gopls: upgrade honnef.co/go/tools to v0.1.3

$ go mod edit -require=honnef.co/go/tools@latest
$ rm -f go.sum; go1.16.2 mod tidy -v

Change-Id: Id1fb0373334ada1daf8fb5b6c488bf2dfea055fe
Reviewed-on: https://go-review.googlesource.com/c/tools/+/303850
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
Trust: Rebecca Stambler <rstambler@golang.org>
Trust: Heschi Kreinick <heschi@google.com>
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
gopls-CI: kokoro <noreply+kokoro@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
diff --git a/gopls/go.mod b/gopls/go.mod
index bfee7c6..2b09125 100644
--- a/gopls/go.mod
+++ b/gopls/go.mod
@@ -10,7 +10,7 @@
 	golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c
 	golang.org/x/tools v0.1.0
 	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1
-	honnef.co/go/tools v0.1.1
+	honnef.co/go/tools v0.1.3
 	mvdan.cc/gofumpt v0.1.0
 	mvdan.cc/xurls/v2 v2.2.0
 )