ci: run ci against node 18.x, 20.x (#389)

inversify/InversifyJS#1527

Author: Jameskmonger

.github/workflows/node.js.yml

@@ -16,7 +16,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [12.x, 14.x, 16.x]
+        node-version: [18.x, 20.x]
         ts-project: [src/tsconfig.json, src/tsconfig-es6.json]
 
     env: