Add regexes for PS4 UA and OS

I am using [Karma](http://karma-runner.github.io/0.12/index.html) to run unit tests in various browsers including a PlayStation 4 web browser.

I noticed that Karma would output `Other 0.0.0 (Other 0.0.0)` when running on the PS4. I've added a couple regexes to address the issue. After the change, useragent returns `PS4 WebKit 536.26.0 (PlayStation 4 1.62)`.

I locally unit tested the change with a new test case in `test/parser.test.js` but I have not added it to this pull requests. Please let me know if you would like me to add it.

cc @3rd-Eden