fix: replace requesthub slack with discord (#1032)

Co-authored-by: MantisClone <[email protected]>

CONTRIBUTING.md

@@ -4,7 +4,7 @@ We welcome contributions from anyone, and are grateful for even the smallest of
 
 ## Got a Question or Problem?
 
-For quick help, join the [Request Hub Slack](https://request-slack.herokuapp.com/) and ask your question there.
+For quick help, join the [Request Discord](https://request.network/discord/) and ask your question there.
 You will get a reply much faster than by opening an issue.
 
 ## Found a Bug?

README.md

@@ -10,11 +10,11 @@
 
 This repository contains all the Request Network developer tools written in TypeScript.
 
-Join the [Request Hub][requesthub-slack-url] to get in touch with us.
+Join the [Request Discord][request-discord-url] to get in touch with us.
 
 [website-url]: https://request.network
 [whitepaper-url]: https://request.network/assets/pdf/request_whitepaper.pdf
-[requesthub-slack-url]: https://request-slack.herokuapp.com/
+[request-discord-url]: https://request.network/discord/
 
 ### Published Packages
 

packages/request-client.js/README.md

@@ -71,7 +71,7 @@ const requestNetwork = new RequestNetwork({ useMockStorage: true });
 
 ## Guide
 
-We are currently writing the full API reference and more detailed guides. This section will be updated. If you need help in the meantime, [join the Request Hub Slack](https://request-slack.herokuapp.com/) and come chat with us.
+We are currently writing the full API reference and more detailed guides. This section will be updated. If you need help in the meantime, [join the Request Discord](https://request.network/discord/) and come chat with us.
 
 ### Create a request