Merge branch 'bump-browser-gem-version-for-ie11' into 'master'

Update browser gem to version 0.8.0

Internet Explorer 11.0.9600.17633 has a new User-Agent string (tested using [BrowserStack](https://www.browserstack.com)):

```
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko
```

This is supported in v0.8.0 of the browser gem:

https://github.com/fnando/browser/commit/aab7a81d94cc2c31c4b860fa4a9b9a361adf1bab

Closes #1775

See merge request !791