Add install-only test job and fix action.yml

.github/workflows/ci.yml

@@ -49,6 +49,36 @@ jobs:
           version: ${{ matrix.version }}
           args: release --skip-publish --rm-dist
 
+  install-only:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        version:
+          - latest
+          - v0.117.0
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v2.3.4
+        with:
+          fetch-depth: 0
+      -
+        name: Set up Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: 1.14
+      -
+        name: GoReleaser
+        uses: ./
+        with:
+          version: ${{ matrix.version }}
+          install-only: true
+      -
+        name: Check
+        run: |
+          goreleaser check --debug
+
   signing:
     runs-on: ${{ matrix.os }}
     if: github.event_name != 'pull_request'