Fix Windows build by using windows-2019 (#196)

Author: KevinEady

.github/workflows/nodejs.yml

@@ -13,7 +13,7 @@ jobs:
     strategy:
       matrix:
         node-version: [12.18.0, 14.x, 16.x]
-        operating-system: [ubuntu-latest, windows-latest, macos-latest]
+        operating-system: [ubuntu-latest, windows-2019, macos-latest]
 
     steps:
       - uses: actions/checkout@v2