fix: Access token callback can return null (#440)

Author: filipecabaco

src/RealtimeClient.ts

@@ -112,7 +112,7 @@ export default class RealtimeClient {
     message: [],
   }
   fetch: Fetch
-  accessToken: (() => Promise<string>) | null = null
+  accessToken: (() => Promise<string | null>) | null = null
   worker?: boolean
   workerUrl?: string
   workerRef?: Worker

test/channel.test.ts

@@ -1203,7 +1203,6 @@ describe('send', () => {
     const pushStub = sinon.stub(new_channel, '_push')
 
     new_channel.subscribe(async (status) => {
-      console.log(status)
       if (status === 'SUBSCRIBED') {
         subscribed = true
         await new_channel.send({ type: 'broadcast', event: 'test' })
@@ -1232,7 +1231,6 @@ describe('send', () => {
     const pushStub = sinon.stub(new_channel, '_push')
 
     new_channel.subscribe(async (status) => {
-      console.log(status)
       if (status === 'TIMED_OUT') {
         timed_out = true
       }