Add GolangCI action.

.github/workflows/lint.yml

@@ -0,0 +1,35 @@
+name: golangci-lint
+on:
+  pull_request:
+    types:
+      - labeled
+      - unlabeled
+      - synchronize
+      - opened
+      - edited
+      - ready_for_review
+      - reopened
+      - unlocked
+  pull_request_review:
+    types:
+      - submitted
+  check_suite:
+    types:
+      - completed
+  status: {}
+jobs:
+  golangci:
+    strategy:
+      matrix:
+        go-version: 
+          - 1.14.x
+        os: 
+          - ubuntu-latest
+    name: lint
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v2
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v2
+        with:
+          version: v1.29