Release v3.9.1

• fix release script to bump version number in flake.nix

Release v3.9.0

• add github-release-notifier formatter
  in #93
  by @nrekretep
• optionally serve hooks via a UNIX domain socket
  in #123
  by @timo-schluessler
• try to reconnect on LocalProtocolError
  in #135
• flakify
  in #136
• add mwe gitlab webhook formatter. Intergrations are better for now
• replace black & isort by ruff
• update dependencies

Release v3.8.0

• add a healthcheck for load balancers
  in #77
  by @chronicc
• error_map: default to 500
• tools: flake8, pydocstyle, pyupgrade → ruff

Release v3.7.0

• Add support for using predefined access tokens
  in #67
  by @ananace

Release v3.6.0

• update docker to python 3.11
• update tooling
• update lints
• update ci/cd

Release v3.5.0

• Add formatter for grafana 9
  in #45
  by @svenseeberg

Release v3.4.0

• fix tests
• add matrix-webhook script
  in #25
  and #35
  by @a7p
• publish linux/arm64 image
  in #37
  by @kusold
• update badges
• setup dependabot
• misc upgrades from poetry update, pre-commit.ci, and dependabot

Release v3.3.0

• add pyupgrade
• add gitlab formatter for google chat & microsoft teams
  in #21
  by @GhislainC
• join room before sending message
  in #12
  by @bboehmke

Release v3.2.1

• fix changelog

Release v3.2.0

• add github & grafana formatters
• add formatted_body to bypass markdown with direct matrix-custom-HTML
• allow "key" to be passed as a parameter
• allow to use a sha256 HMAC hex digest with the key instead of the raw key
• allow "room_id" to be passed as a parameter or with the data
• rename "text" to "body".
• Publish releases also on github from github actions
• fix tests for recent synapse docker image