ci: integrate GitHub Actions

.github/workflows/go.yml

@@ -0,0 +1,41 @@
+name: Go
+on: [push]
+jobs:
+
+  test:
+    name: test
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        go: [ '1.11.x', '1.12.x', '1.13.x']
+    steps:
+
+    - name: Setup go
+      uses: actions/setup-go@v1
+      with:
+        go-version: ${{ matrix.go }}
+
+    - name: Check out code into the Go module directory
+      uses: actions/checkout@v1
+
+    - name: Set GOPATH
+      # temporary fix
+      # see https://github.com/actions/setup-go/issues/14
+      run: |
+        echo "##[set-env name=GOPATH;]$(dirname $GITHUB_WORKSPACE)"
+        echo "##[add-path]$(dirname $GITHUB_WORKSPACE)/bin"
+      shell: bash
+
+    - name: Get dependencies
+      run: | 
+        go get -u -v golang.org/x/lint/golint
+        go mod tidy -v
+
+    - name: Linter
+      run: golint -set_exit_status ./...
+
+    - name: Tests
+      run: go test -coverprofile=coverage.txt -covermode=atomic ./...
+
+    - name: Codecov
+      run: bash <(curl -s https://codecov.io/bash)