* Updating client dependancies. Switching to using yarn.
* Updating React
* Moving pure components to using function syntax (performance gains with newer react version)
* Updating client dependancies.
* Ignore .yarninstall
* Enabling pre-lockfile because it's the entire point of using yarn.
* Removing old webpack config
* Moving to new prop-types
* Fixing ESLint Errors
* Updating jest snapshots.
* Cleaning up package.json
* WebRTC Server side
* WebRTC client side
* Bug fixes and improvements
* Pushing UI improvements for webrtc (#3728)
* Pushing UI improvements for webrtc
* Updating webrtc css
* PLT-3943 WebRTC P1: bug fixes and improvements
* Video resolution set to std, reduce volume of ringtone and flip video horizontally
* Fix calling a user B while WebRTC RHS is still opened
* Leave RHS opened when call ends, Fix isBusy on popover and channel_header
* Fix pre-release feature, RHS & System Console
* PLT-3945 - Updating UI for webrtc (#3908)
* PLT-3943 Webrtc p1
* Add ongoing call indicator when RHS is opened
* UI updates to to webrtc notifcation (#3959)
