Node: make types.ts only export types rather than the entire class/co…

…de (#1109)

Same as in versatica/mediasoup-client#273

node/src/types.ts

@@ -1,23 +1,24 @@
-export * from './Worker';
-export * from './WebRtcServer';
-export * from './Router';
-export * from './Transport';
-export * from './WebRtcTransport';
-export * from './PlainTransport';
-export * from './PipeTransport';
-export * from './DirectTransport';
-export * from './Producer';
-export * from './Consumer';
-export * from './DataProducer';
-export * from './DataConsumer';
-export * from './RtpObserver';
-export * from './ActiveSpeakerObserver';
-export * from './AudioLevelObserver';
-export * from './RtpParameters';
-export * from './SctpParameters';
-export * from './SrtpParameters';
+export type * from './Worker';
+export type * from './WebRtcServer';
+export type * from './Router';
+export type * from './Transport';
+export type * from './WebRtcTransport';
+export type * from './PlainTransport';
+export type * from './PipeTransport';
+export type * from './DirectTransport';
+export type * from './Producer';
+export type * from './Consumer';
+export type * from './DataProducer';
+export type * from './DataConsumer';
+export type * from './RtpObserver';
+export type * from './ActiveSpeakerObserver';
+export type * from './AudioLevelObserver';
+export type * from './RtpParameters';
+export type * from './SctpParameters';
+export type * from './SrtpParameters';
+// We cannot export only the type of error classes because those are useless.
 export * from './errors';
-export { ScalabilityMode } from './scalabilityModes';
+export type { ScalabilityMode } from './scalabilityModes';
 
 export type AppData =
 {