Prepare migration to ESM (#1022)

.github/workflows/CI.yml

@@ -10,12 +10,17 @@ jobs:
   test:
     runs-on: ubuntu-latest
     strategy:
+      fail-fast: false
       matrix:
-        node-version: [14.x, 16.x, 18.x, 20.x, 22.x]
+        # Do not support --experimental-require-module
+        # Commented until we have a solution to run tests without it
+        # node-version: [14, 16, 18, 20, 22]
+        # node-version: [20, 22] // fails on 20 with (0 , _getDomain.default) is not a function
+        node: [22]
     steps:
       - uses: actions/checkout@v4
 
-      - name: Use Node.js ${{ matrix.node-version }}
+      - name: Use Node.js ${{ matrix.node }}
         uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node }}

ava.config.js

@@ -20,6 +20,7 @@ export default {
       ],
     },
   },
+  nodeArguments: ["--experimental-require-module"],
   files: [
     "packages/**/test.js",
     "packages/**/test/*.js",

e2e.config.js

@@ -21,5 +21,6 @@ export default {
       ],
     },
   },
+  nodeArguments: ["--experimental-require-module"],
   files: ["test/*.js"],
 };

eslint.config.mjs

@@ -32,7 +32,7 @@ export default [
           jsx: true,
         },
       },
-      sourceType: "script",
+      sourceType: "commonjs",
     },
 
     rules: {
@@ -65,6 +65,10 @@ export default [
         "error",
         { allowModules: ["ava", "sinon", "@xmpp/test"] },
       ],
+      "n/no-extraneous-import": [
+        "error",
+        { allowModules: ["ava", "sinon", "@xmpp/test"] },
+      ],
 
       // promise
       // https://github.com/xjamundx/eslint-plugin-promise
@@ -88,10 +92,9 @@ export default [
     },
   },
   {
-    files: ["server/ctl.js"],
-    rules: {
-      "n/no-unsupported-features/es-syntax": "off",
-      "n/no-unsupported-features/es-syntax": "off",
+    files: ["packages/client/**/*.js"],
+    languageOptions: {
+      sourceType: "module",
     },
   },
 ];