Upgrade to eslint v9

test/.eslintrc.js

@@ -1,12 +0,0 @@
-module.exports = {
-  env: {
-    "node": true,
-    "mocha": true
-  },
-  "parserOptions": {
-    "ecmaVersion": 2018
-  },
-  "rules": {
-    "no-restricted-globals": ["error", "browser"]
-  }
-};

test/common.js

@@ -1,5 +1,4 @@
 if (!process.listenerCount("unhandledRejection")) {
-  // eslint-disable-next-line no-console
   process.on("unhandledRejection", r => console.log(r));
 }