Signed-off-by: Andrew Ferrazzutti <andrewf@element.io>

Had to be done manually due to matrix-discord-parser pulling in a `git:`
dependency of its own.

Signed-off-by: Andrew Ferrazzutti <andrewf@element.io>

Using Git over HTTPS instead.

Unencrypted `git://` does not seem to be supported by GitHub anymore:
https://github.blog/2021-09-01-improving-git-protocol-security-github/

This prevented the package from building on NixOS:
https://github.com/NixOS/nixpkgs/issues/165246

Handle invalid Discord tokens gracefully

Add Github CI for linting and tests

Implement RMAU tracking and optionally blocking the bridge after a RMAU limit is reached

This makes us dependent on matrix-appservice-bridge to make use of
UserActivityTracker and BridgeBlocker, which also bumps matrix-bot-sdk
to a higher required version.

Do not use default

Allow admins to disable portal rooms and enforce room limits

Metrics.enable: Correct config sample and schema

Merge branch 'cos/update_sdk_version' of https://github.com/vranki/matrix-appservice-discord into develop

Merge branch 'j94/copy-changes' of https://github.com/jaller94/matrix-appservice-discord into develop