update windows and linux runners

Author: valpinkman

.github/workflows/test-prebuild.yml

@@ -6,7 +6,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-16.04, macos-latest, windows-2016]
+        os: [ubuntu-20.04, macos-latest, windows-2019]
     steps:
       - uses: actions/checkout@v1
       - uses: actions/setup-node@master