Add goreleaser and github workflows

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

.github/workflows/ci.yml

@@ -0,0 +1,19 @@
+name: Go implementation (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: 1.14
+    - name: GoReleaser
+      uses: goreleaser/goreleaser-action@v1
+      with:
+        version: latest
+        args: release --snapshot --skip-publish --rm-dist

.github/workflows/release.yml

@@ -1,29 +1,23 @@
-name: release
+name: Release
 on:
   push:
     tags:
     - 'v*.*.*'
 jobs:
-  release:
+  goreleaser:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
       uses: actions/checkout@master
-    - name: Create Release
-      id: create_release
-      uses: actions/create-release@v1
+    - name: Setup Go
+      uses: actions/setup-go@v1
+      with:
+        go-version: 1.14
+    - name: GoReleaser
+      uses: goreleaser/goreleaser-action@v1
+      with:
+        version: latest
+        args: release --rm-dist
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      with:
-        tag_name: ${{ github.ref }}
-        release_name: Release ${{ github.ref }}
-    - name: Update new version for plugin 'ctx' in krew-index
-      uses: rajatjindal/krew-release-bot@v0.0.37
-      with:
-        krew_template_file: .krew/ctx.yaml
-    - name: Update new version for plugin 'ns' in krew-index
-      uses: rajatjindal/krew-release-bot@v0.0.37
-      with:
-        krew_template_file: .krew/ns.yaml 
-