Merge pull request #1 from ojizero/test-matrix

Use matrix to test on windows and macos as well as linux

.github/workflows/push.yml

@@ -8,8 +8,14 @@ on:
       - master
 jobs:
   test-package:
+    strategy:
+      matrix:
+        os:
+          - ubuntu-latest
+          - macos-latest
+          - windows-latest
     name: Test
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
     steps:
       - name: Set up Go 1.13
         uses: actions/setup-go@v1