Chore: Upgrade golangci-lint (#27719)

* Chore: Upgrade golangci-lint to latest
* ci-build: Upgrade Node/Yarn

Signed-off-by: Arve Knudsen <arve.knudsen@gmail.com>

scripts/go/go.mod

@@ -3,7 +3,7 @@ module github.com/grafana/grafana/scripts/go
 go 1.14
 
 require (
-	github.com/golangci/golangci-lint v1.30.0
+	github.com/golangci/golangci-lint v1.31.0
 	github.com/mattn/go-runewidth v0.0.9 // indirect
 	github.com/mgechev/revive v1.0.2
 	github.com/unknwon/bra v0.0.0-20190805204333-bb0929b6cca0
@@ -11,6 +11,5 @@ require (
 	github.com/unknwon/log v0.0.0-20150304194804-e617c87089d3 // indirect
 	github.com/urfave/cli v1.20.0 // indirect
 	golang.org/x/sys v0.0.0-20200808120158-1030fc2bf1d9 // indirect
-	golang.org/x/tools v0.0.0-20200809012840-6f4f008689da // indirect
 	gopkg.in/fsnotify/fsnotify.v1 v1.4.7 // indirect
 )