B5

* `b5-init` now also allows usage of `.yaml` file extension for configs.

* BREAKING: b5 now requires at least Python 3.8. (>3.8.1)
* BREAKING: b5 will require to have a docker compose config file available for config file name detection. See
https://docs.docker.com/compose/compose-file/#compose-file for details about the new naming schema. If you cannot
provide an appropriate file (for example in skeletons), you may use the option `docker_compose_configs` to provide
a file name. The first file name provided here will determine the config file prefix and extension used for
`docker_compose_config_overrides`.
* Updated all dependencies to their latest versions.
* b5 will now also support config files ending in `.yaml`. Loading config files ending in `.yml` will be deprecated
in the future. Also note that the old `local.yml` local config file is not supported as `local.yaml` - as you should
use `config.local.y(a)ml` instead for some time now. Thanks to Andreas Rau for noticing the
[missing support for `.yaml` files](https://git.team23.de/build/b5/-/issues/4).

* Fix version number in code 🙈

* Fix regression with docker compose config file name detection. When no file is found in the current directory,
the old default file name is now used (`docker-compose.yml`). This will change in b5 1.4.0.

* You now can get a raw task list using `b5 --quiet help --tasks`
* Support for new docker compose path spec (see https://docs.docker.com/compose/compose-file/#compose-file)

* Fix issue with docker compose needing `-T` for all pipes now (docker compose 2.2.3 seems to have introduced this)