www/rubygem-browser: upgrade from 2.0.3 to 2.2.0
- Browser::Platform#windows? can now compare versions.
- Browser::Platform#mac? can now compare versions.
- Detect QQ Browser.
- Fix issue with Mac user agents that didn't include the version.
- Add PrivacyAwareBot, ltx71, Squider and Traackr to bots.
- Match Google Structured Data alternative bot.
- Match MicroMessenger (WeChat).
- Match Weibo.
- Detect Windows & Mac OS versions.
Approved by: pi (mentor)