Javascript bower安装最终出现错误：无法调用方法'；拆分'；空的

My component.json文件：

{
  "name": "my-project",
  "version": "1.0.0",
  "main": "path/to/main.css",
  "dependencies": {
    "jquery": null
  }
}

当我跑的时候 $bower安装

我得到：

bower错误无法调用null的方法“split”

Stack trace:
TypeError: Cannot call method 'split' of null
    at Object.json2decomposed (/usr/local/lib/node_modules/bower/node_modules/bower-endpoint-parser/index.js:40:23)
    at Project._restoreNode (/usr/local/lib/node_modules/bower/lib/core/Project.js:704:35)
    at /usr/local/lib/node_modules/bower/node_modules/mout/object/forOwn.js:12:27
    at exec (/usr/local/lib/node_modules/bower/node_modules/mout/object/forIn.js:57:19)
    at forIn (/usr/local/lib/node_modules/bower/node_modules/mout/object/forIn.js:38:17)
    at Object.forOwn (/usr/local/lib/node_modules/bower/node_modules/mout/object/forOwn.js:10:9)
    at Project._restoreNode (/usr/local/lib/node_modules/bower/lib/core/Project.js:702:17)
    at Project._analyse (/usr/local/lib/node_modules/bower/lib/core/Project.js:446:14)
    at Q.async (/usr/local/lib/node_modules/bower/node_modules/q/q.js:1126:30)
    at _fulfilled (/usr/local/lib/node_modules/bower/node_modules/q/q.js:703:54)

---

null

不是依赖项的有效值。您必须指定一个版本

"dependencies": {
  "jquery": "1.10.2"
}

可以通过指定一个近似值：

或者，可以将其设置为

“最新”

，它将安装

2.0.3

，当前：

"jquery": "latest"

"jquery": "1.10.x"

"jquery": "latest"