* commit 'de119063f': (31 commits)
  Convert room list handler to async/await. (#7912)
  Element CSS and logo in email templates (#7919)
  Lint the contrib/ directory in CI and linting scripts, add synctl to linting script (#7914)
  Remove unused code from synapse.logging.utils. (#7897)
  Fix a typo in the sample config. (#7890)
  Fix deprecation warning: import ABC from collections.abc (#7892)
  Change sample config's postgres user to synapse_user (#7889)
  Fix deprecation warning due to invalid escape sequences (#7895)
  Remove Ubuntu Eoan that is now EOL (#7888)
  Fix the trace function for async functions. (#7872)
  Add help for creating a user via docker (#7885)
  Switch to Debian:Slim from Alpine for the docker image (#7839)
  Stop using 'device_max_stream_id' (#7882)
  Fix TypeError in synapse.notifier (#7880)
  Add a default limit (of 100) to get/sync operations. (#7858)
  Change "unknown room ver" logging to warning. (#7881)
  Convert device handler to async/await (#7871)
  Convert synapse.app to async/await. (#7868)
  Convert _base, profile, and _receipts handlers to async/await (#7860)
  Add admin endpoint to get members in a room. (#7842)
  ...