chore: migrate code to ESM (#73)

node_modules/undici/lib/mock/mock-errors.js

@@ -1,17 +0,0 @@
-'use strict'
-
-const { UndiciError } = require('../core/errors')
-
-class MockNotMatchedError extends UndiciError {
-  constructor (message) {
-    super(message)
-    Error.captureStackTrace(this, MockNotMatchedError)
-    this.name = 'MockNotMatchedError'
-    this.message = message || 'The request does not match any registered mock dispatches'
-    this.code = 'UND_MOCK_ERR_MOCK_NOT_MATCHED'
-  }
-}
-
-module.exports = {
-  MockNotMatchedError
-}