chore: use es modules with unit tests (both commonjs and esm work)

Author: NathanWalker

apps/nativescript-demo-ng/project.json

@@ -53,8 +53,7 @@
       "executor": "@nativescript/nx:test",
       "outputs": ["{workspaceRoot}/coverage/apps/nativescript-demo-ng"],
       "options": {
-        "coverage": false,
-        "flags": "--env.commonjs"
+        "coverage": false
       },
       "configurations": {}
     }