message: Update README.md
  Update README with latest links.
diff: @@ -11,7 +11,7 @@ The Symbol SDK for TypeScript / JavaScript allows you to develop web, mobile, an
  ### _Catapult-Server_ Network Compatibility (catapult-server@0.10.0.8)
  -Symbol network launched [catapult-server](https://github.com/nemtech/catapult-server/releases/tag/v1.0.0.0), **it is recommended to use this package's 1.0.0 version and upwards for the Symbol public network**.
  +Symbol network launched [catapult-client](https://github.com/symbol/catapult-client/releases/tag/v1.0.0.0), **it is recommended to use this package's 1.0.0 version and upwards for the Symbol public network**.
  Find the complete release notes [here](CHANGELOG.md).
  @@ -40,7 +40,7 @@ Use the following available resources to get help:
  - [Symbol Documentation][docs]
  - [Symbol SDK Typescript/Javascript Reference][sdk-ref]
  -- Join the community [slack group (#sig-api)][slack]
  +- Join the community [Discord server][discord]
  - If you found a bug, [open a new issue][issues]
  ## Contributing
  @@ -55,9 +55,9 @@ You can also find useful notes for developers under our documentation [guideline
  Copyright (c) 2018-present NEM
  Licensed under the [Apache License 2.0](LICENSE)
  -[self]: https://github.com/nemtech/symbol-sdk-typescript-javascript
  -[docs]: http://nemtech.github.io/getting-started/setup-workstation.html
  -[issues]: https://github.com/nemtech/symbol-sdk-typescript-javascript/issues
  -[sdk-ref]: https://nemtech.github.io/references/typescript-sdk.html
  -[guidelines]: https://nemtech.github.io/contribute/contributing.html#sdk
  -[slack]: https://join.slack.com/t/nem2/shared_invite/enQtMzY4MDc2NTg0ODgyLWZmZWRiMjViYTVhZjEzOTA0MzUyMTA1NTA5OWQ0MWUzNTA4NjM5OTJhOGViOTBhNjkxYWVhMWRiZDRkOTE0YmU
  +[self]: https://github.com/symbol/symbol-sdk-typescript-javascript
  +[docs]: http://docs.symbolplatform.com/getting-started/setup-workstation.html
  +[issues]: https://github.com/symbol/symbol-sdk-typescript-javascript/issues
  +[sdk-ref]: https://docs.symbolplatform.com/references/typescript-sdk.html
  +[guidelines]: https://docs.symbolplatform.com/contribute/contributing.html#sdk
  +[discord]: https://discord.com/invite/xymcity
  