Change node version definition in node-js-ci

Author: humphd

.github/workflows/node-js-ci.yml

@@ -14,7 +14,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        node-version: [12.x, 14.x]
+        node: ['12', '14']
 
     name: Node ${{ matrix.node_version }} on ${{ matrix.os }}
     steps: