add github actions (#18)

* add github workflows

* update go version to 1.16 to allow mac m1 build

.github/workflows/go-release.yml

@@ -0,0 +1,21 @@
+on:
+  release:
+    types: [created]
+
+jobs:
+  releases-matrix:
+    name: Release Go Binary
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        # build and publish in parallel: linux/386, linux/amd64, windows/386, windows/amd64, darwin/386, darwin/amd64
+        goos: [linux, darwin]
+        goarch: [amd64, arm64]
+    steps:
+      - uses: actions/checkout@v2
+      - uses: wangyoucao577/go-release-action@v1.15
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          goos: ${{ matrix.goos }}
+          goarch: ${{ matrix.goarch }}
+          goversion: "https://golang.org/dl/go1.16.2.linux-amd64.tar.gz"