ci: add golangci-lint action

Author: sbinet

.github/workflows/lint.yml

@@ -0,0 +1,22 @@
+name: Lint
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  golangci:
+    name: Lint
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v2
+        with:
+          # Required: the version of golangci-lint is required and must
+          # be specified without a patch version:
+          # we always use the latest patch version.
+          version: v1.42
+          args: --timeout=10m