Fix.

node_modules/jest-watcher/build/BaseWatchPlugin.js

@@ -0,0 +1,52 @@
+'use strict';
+
+Object.defineProperty(exports, '__esModule', {
+  value: true
+});
+exports.default = void 0;
+
+function _defineProperty(obj, key, value) {
+  if (key in obj) {
+    Object.defineProperty(obj, key, {
+      value: value,
+      enumerable: true,
+      configurable: true,
+      writable: true
+    });
+  } else {
+    obj[key] = value;
+  }
+  return obj;
+}
+
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+class BaseWatchPlugin {
+  constructor({stdin, stdout}) {
+    _defineProperty(this, '_stdin', void 0);
+
+    _defineProperty(this, '_stdout', void 0);
+
+    this._stdin = stdin;
+    this._stdout = stdout;
+  }
+
+  apply(_hooks) {}
+
+  getUsageInfo(_globalConfig) {
+    return null;
+  }
+
+  onKey(_key) {}
+
+  run(_globalConfig, _updateConfigAndRun) {
+    return Promise.resolve();
+  }
+}
+
+var _default = BaseWatchPlugin;
+exports.default = _default;