3.0.0

• Deprecate @filter() and @filterChildren()
• Introduce a StateView build block that allows to filter data per client
• De-couple encode and decode methods from Schema instances
• De-couple client-side callbacks from Schema instances
  • Breaking changes to the callback API
  • Fix #151
  • Fix #147 (comment)
• Fix known issues from ArraySchema (colyseus/colyseus#641)
• Avoid global type Context (colyseus/colyseus-unity-sdk#131)
• Expose APIs to:
  • Allow to encode/decode arbitrary structures (no need to inherit from Schema class)
  • Allow to customize the change tracking, encoding and decoding at the byte level