Implement "check-latest" flag to check if pre-cached version is latest one (#165)

.github/workflows/build-test.yml

@@ -16,7 +16,7 @@ jobs:
     runs-on: ${{ matrix.operating-system }}
     strategy:
       matrix:
-        operating-system: [ubuntu-latest, windows-latest]
+        operating-system: [ubuntu-latest, windows-latest, macos-latest]
     steps:
       - uses: actions/checkout@v2
       - name: Setup node 12