Update GH Actions

* Ensure line endings for Windows are properly formatted
* Add golangci-lint via GH Actions
* Add race test via GH actions

.gitattributes

@@ -0,0 +1 @@
+*.go text eol=lf

.github/workflows/build.yml

@@ -54,3 +54,9 @@ jobs:
       - name: make test
         run: |
           make test
+
+      - name: headless test
+        uses: GabrielBB/xvfb-action@v1
+        with:
+          # this is running only on Ubuntu: /usr/bin/xvfb-run --auto-servernum go test -v -race ./...
+          run: go test -v -race ./...

.github/workflows/golangci-lint.yml

@@ -0,0 +1,21 @@
+name: golangci-lint
+on:
+    push:
+        tags:
+            - v*
+        branches:
+            - master
+            - main
+    pull_request:
+jobs:
+    golangci:
+        name: lint
+        runs-on: ubuntu-latest
+        steps:
+            - uses: actions/checkout@v2
+            - name: golangci-lint
+              uses: golangci/golangci-lint-action@v2
+              with:
+                  # Optional: version of golangci-lint to use in form of v1.2 or v1.2.3 or `latest` to use the latest version
+                  version: 'latest'
+                  go-version: 1.16