* Change origin whitelist to allow for all valid URIs

- Now supports +, -, and .
- Prevent whitelist from matching when preceded by unwanted characters
- URI must begin with letter
- URI Scheme syntax: https://tools.ietf.org/html/rfc3986#section-3.1

* Add jest testing framework and run it on CI

* Add tests for WebViewShared's createOnShouldStartLoadWithRequest