Add build and release GitHub actions

.github/workflows/go.yaml

@@ -0,0 +1,38 @@
+---
+name: Go
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    steps:
+
+    - name: Set up Go 1.x
+      uses: actions/setup-go@v2
+      with:
+        go-version: ^1.15
+      id: go
+
+    - name: Check out code into the Go module directory
+      uses: actions/checkout@v2
+
+    - name: Get dependencies
+      run: |
+        go get -v -t -d ./...
+        if [ -f Gopkg.toml ]; then
+            curl https://raw.githubusercontent.com/golang/dep/master/install.sh | sh
+            dep ensure
+        fi
+
+    - name: Build
+      run: go build -v .
+
+    - name: Test
+      run: go test -v .

.github/workflows/release.yaml

@@ -0,0 +1,30 @@
+---
+name: Build release
+
+on:
+  release:
+    types: [created]
+
+jobs:
+  release-linux-amd64:
+    name: release linux/amd64
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: wangyoucao577/go-release-action@master
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          goos: linux
+          goarch: amd64
+          binary_name: subjack
+  release-darwin-amd64:
+    name: release darwin/amd64
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: wangyoucao577/go-release-action@master
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          goos: darwin
+          goarch: amd64
+          binary_name: subjack