ci: move tests from Travis CI to GitHub Actions

.github/workflows/tests.yml

@@ -0,0 +1,35 @@
+name: Tests
+
+on:
+  push:
+    paths-ignore:
+    - 'LICENSE'
+    - '**.md'
+    - 'examples/*'
+    - 'templates/*'
+  pull_request:
+    paths-ignore:
+    - 'LICENSE'
+    - '**.md'
+    - 'examples/*'
+    - 'templates/*'
+
+jobs:
+  unit:
+    name: Unit Tests
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Install dependencies
+        run: make get-deps
+
+      - name: Build docker-gen
+        run: make docker-gen
+
+      - name: Check code formatting
+        run: make check-gofmt
+
+      - name: Run tests
+        run: make test

Makefile

@@ -41,7 +41,7 @@ release: dist
 	tar -cvzf docker-gen-darwin-amd64-$(TAG).tar.gz -C dist/darwin/amd64 docker-gen
 
 get-deps:
-	go get ./...
+	go mod download
 
 check-gofmt:
 	if [ -n "$(shell gofmt -l .)" ]; then \