update github actions workflow config

.github/workflows/release.yml

@@ -1,6 +1,7 @@
 name: goreleaser
 
 on:
+  pull_request:
   push:
     tags:
       - "*"
@@ -11,15 +12,17 @@ jobs:
     steps:
       -
         name: Checkout
-        uses: actions/checkout@v1
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
       -
         name: Set up Go
-        uses: actions/setup-go@v1
+        uses: actions/setup-go@v2
         with:
-          go-version: 1.13.5
+          go-version: 1.15
       -
         name: Run GoReleaser
-        uses: goreleaser/goreleaser-action@v1
+        uses: goreleaser/goreleaser-action@v2
         with:
           version: latest
           args: release --rm-dist