Detect Brave Browser

**Is your feature request related to a problem? Please describe.**
Brave Browser is a popular alternative to Chrome, but there is no detection for it in the current library.

**Describe the solution you'd like**
Should be able to detect Brave Browser.

**Describe alternatives you've considered**
Considered not modifying this library and instead using it for all cases _except_ Brave Browser, but then I just decided to commit to this lib.