chore: support ESM module

.gitignore

@@ -21,3 +21,4 @@ MANIFEST.json
 coverage/
 *.cddl
 wpt-metadata/mapper/headful/webdriver/tests/bidi/
+*.tsbuildinfo

.mocharc.cjs

@@ -0,0 +1,25 @@
+/**
+ * Copyright 2024 Google LLC.
+ * Copyright (c) Microsoft Corporation.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+module.exports = {
+  logLevel: 'debug',
+  require: ['source-map-support/register'],
+  spec: '{lib/esm,tools}/**/*.spec.{js,mjs}',
+  // This should make mocha crash on uncaught errors.
+  // See https://github.com/mochajs/mocha/blob/master/docs/index.md#--allow-uncaught.
+  allowUncaught: true,
+};

.vscode/launch.template.json

@@ -11,8 +11,8 @@
       "skipFiles": ["<node_internals>/**"],
       "cwd": "${workspaceFolder}",
       "console": "externalTerminal",
-      "program": "${workspaceFolder}/lib/cjs/bidiServer/index.js",
-      "outFiles": ["${workspaceFolder}/lib/cjs/bidiServer/**/*.js"],
+      "program": "${workspaceFolder}/lib/esm/bidiServer/index.js",
+      "outFiles": ["${workspaceFolder}/lib/esm/bidiServer/**/*.js"],
       "args": ["--headless=false"],
       "env": {
         "DEBUG": "*",