update github actions

Author: kazupon

.github/workflows/test.yml

@@ -23,7 +23,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-latest, windows-latest, macos-latest]
+        os: [ubuntu-latest]
         node: [14, 16]
     steps:
       - name: Checkout