UNMET PEER DEPENDENCY angular2@2.0.0-beta.14
<p>I've installed npm package and I noticed this console log:</p>

<pre><code>UNMET PEER DEPENDENCY angular2@2.0.0-beta.14

npm WARN optional Skipping failed optional dependency /chokidar/fsevents:
npm WARN notsup Not compatible with your operating system or architecture: fsevents@1.0.12
npm WARN angular2-modal@0.1.4 requires a peer of angular2@2.0.0-beta.15 but none was installed.
npm WARN ng2-bootstrap@1.0.15 requires a peer of angular2@2.0.0-beta.16 but none was installed.
npm WARN angular2-quickstart@1.0.0 No repository field.
</code></pre>

<p>What does that mean?</p>

<p>I tried to npm install angular2, but the output is same.</p>

<p>package.json depencies</p>

<pre><code>"dependencies": {
    "@angular2-material/card": "^2.0.0-alpha.2",
    "@angular2-material/checkbox": "^2.0.0-alpha.2",
    "@angular2-material/core": "^2.0.0-alpha.2",
    "@angular2-material/input": "^2.0.0-alpha.2",
    "@angular2-material/progress-circle": "^2.0.0-alpha.2",
    "@angular2-material/radio": "^2.0.0-alpha.2",
    "@angular2-material/sidenav": "^2.0.0-alpha.2",
    "@angular2-material/toolbar": "^2.0.0-alpha.2",
    "angular2": "2.0.0-beta.14",
    "angular2-modal": "^0.1.3",
    "es6-shim": "^0.35.0",
    "ng2-bootstrap": "^1.0.11",
    "ng2-bs3-modal": "^0.5.1",
    "ng2-material": "^0.3.5",
    "reflect-metadata": "0.1.2",
    "rxjs": "5.0.0-beta.2",
    "systemjs": "0.19.25",
    "zone.js": "0.6.6",
    "socket.io":"1.4.5"
</code></pre>