v5.3.0

Features

• common: caching mechanism - add CacheModule module #695
• common: serialization - add ClassSerializerInterceptor interceptor
• common: add MulterModule module
• core: ExternalContextCreator now supports pipes
• websockets: support acknowledgments in socketio IoAdapter #982

Bug Fixes

• core: expose valid HttpServer within ExpressAdapter #1017

Improvements

• core: injector improvements (mainly circular dependencies)
• websockets: improve adapters (WsAdapter and IoAdapter)