test against node 14, 16, 18

Author: RobinMalfait

.github/workflows/nodejs.yml

@@ -18,7 +18,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [12, 14, 16]
+        node-version: [14, 16, 18]
 
     steps:
       - uses: actions/checkout@v2