add ci workflow

Signed-off-by: Ahmet Alp Balkan <ahmetb@google.com>

Author: ahmetb

.github/workflows/ci.yml

@@ -0,0 +1,19 @@
+name: ci
+on:
+  push:
+  pull_request:
+jobs:
+  goreleaser:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@master
+    - name: Setup Go
+      uses: actions/setup-go@v1
+      with:
+        go-version: 1.13
+    - name: GoReleaser
+      uses: goreleaser/goreleaser-action@v1
+      with:
+        version: latest
+        args: release --snapshot --rm-dist