Release v1.2.0

• Added ability for an application to specify custom TURN/STUN server
  -- By default, High Fidelity's TURN server will be used, which should suffice for most operations
  -- Specifying a custom TURN server is useful for testing or for specifying a commercial TURN server provider when dealing with particularly challenging client networks/firewalls
• Update to v7.4.6 of websocket library to address a published security vulnerability
• Fix so that client gets correct websocket port from URL (when provided)
• Updated to libravi v4.4.2
  -- Fixes to event handling
  -- Improved websocket connection handling
  -- More descriptive websocket connection error messages now propagated to client library
• Updates to the documentation of mute
• Updates to automated tests (added tests for attenuation and software muting, improved connection error messages)