Assertions CaSe sensitivity

This assertion 

```
.assert.numberOfElements('meta[name="description"]',1, 'META-DESCRIPTION: Should exists once')
```

fails on this element: 

```
<meta name="Description" content="Apple leads the world in innovation with iPhone, iPad, Mac, Apple Watch, iOS, OS X, watchOS and more. Visit the site to learn, buy, and get support." />
```
## 

Is there a way to make the selector case insensitive?
