fix: updated closing dangling streams at src/transit.js

[JS-AK]

added clean and close this.pendingResStreams when node disconnected

📝 Description

Fixed memory leak when another microservice started stream with broker.call and then switched off (with reboot for example)

Create 3 services, api-gw, test-1, test-2
api-gw handle request -> test-1
test-1 make stream and send it to test-2
test-2 send answer stream to test-1
test-1 send stream to api-gw
terminate test-2 process

If microservice test-2 was terminated (in active stream process) in api-gw service src/transit.js this.pendingResStreams and this.pendingRequests was not released/deleted

💎 Type of change

• Bug fix (non-breaking change which fixes an issue)

🏁 Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas

It is for close issue
#1296

Repo for reproduce this bug

https://github.com/JS-AK/moleculer-pr-1307-example

[pkg-pr-new]

Open in Stackblitz

npm i https://pkg.pr.new/moleculerjs/moleculer@1307

commit: c197d5c

[icebob]

Thanks!