set up github actions

Author: masaushi

.github/workflows/test.yml

@@ -0,0 +1,56 @@
+name: CI test
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  test:
+    name: Go ${{ matrix.go-version }} Test
+
+    strategy:
+      matrix:
+        go-version: [1.16.x, 1.17.x]
+#        platform: [ubuntu-latest, macos-latest, windows-latest]
+        platform: [ubuntu-latest, macos-latest]
+
+    runs-on: ${{ matrix.platform }}
+
+    steps:
+      - name: Set up Go ${{ matrix.go-version }}
+        uses: actions/setup-go@v2
+        with:
+          go-version: ${{ matrix.go-version }}
+        id: go
+
+      - name: Check out codes
+        uses: actions/checkout@v2
+
+      - name: Cache modules
+        uses: actions/cache@v2
+        with:
+          # In order:
+          # * Module download cache
+          # * Build cache (Linux)
+          # * Build cache (Mac)
+          # * Build cache (Windows)
+          path: |
+            ~/go/pkg/mod
+            ~/.cache/go-build
+            ~/Library/Caches/go-build
+            %LocalAppData%\go-build
+          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+          restore-keys: |
+            ${{ runner.os }}-go-
+
+      - name: Run lint
+        uses: golangci/golangci-lint-action@v2
+        with:
+          version: v1.42
+
+      - name: Run tests
+        run: go test ./...