Test for later versions of Node

Author: jbrooksuk

.github/workflows/tests.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [7.x, 8.x, 10.x, 12.x]
+        node-version: [14.x, 16.x, 18.x, 20.x]
     steps:
     - uses: actions/checkout@v2
     - name: Use Node.js ${{ matrix.node-version }}