Copy golangci-lint settings from restic

.github/workflows/tests.yml

@@ -50,6 +50,11 @@ jobs:
     name: lint
     runs-on: ubuntu-latest
     steps:
+      - name: Set up Go ${{ env.latest_go }}
+        uses: actions/setup-go@v2
+        with:
+          go-version: ${{ env.latest_go }}
+
       - name: Check out code
         uses: actions/checkout@v2
 
@@ -57,8 +62,16 @@ jobs:
         uses: golangci/golangci-lint-action@v2
         with:
           # Required: the version of golangci-lint is required and must be specified without patch version: we always use the latest patch version.
-          version: v1.41
+          version: v1.45
+          # Optional: show only new issues if it's a pull request. The default value is `false`.
+          only-new-issues: true
           args: --verbose --timeout 5m
+          skip-go-installation: true
+
+        # only run golangci-lint for pull requests, otherwise ALL hints get
+        # reported. We need to slowly address all issues until we can enable
+        # linting the master branch :)
+        if: github.event_name == 'pull_request'
 
       - name: Check go.mod/go.sum
         run: |