Openbrokerapi

- Update depenendcies
- Read settings values during check, instead of import time
Use `import openbrokerapi.settings; openbrokerapi.settings.DISABLE_SPACE_ORG_GUID_CHECK = True`
to disable the check for space_guid and organization_guid, or use the environment variable
`DISABLE_SPACE_ORG_GUID_CHECK=True`

- Update to latest dependencies (incl Flask >=3)

- Update dependencies

- Removing types-urllib3 (1.26.25.14)
- Updating charset-normalizer (3.2.0 -> 3.3.0)
- Updating urllib3 (2.0.4 -> 2.0.6)
- Updating zipp (3.16.2 -> 3.17.0)
- Updating packaging (23.1 -> 23.2)
- Updating blinker (1.6.2 -> 1.6.3)
- Updating filelock (3.12.2 -> 3.12.4)
- Updating platformdirs (3.10.0 -> 3.11.0)
- Updating setuptools (68.1.2 -> 68.2.2)
- Updating werkzeug (2.3.7 -> 3.0.0)
- Updating identify (2.5.27 -> 2.5.30)
- Updating pluggy (1.2.0 -> 1.3.0)
- Updating typing-extensions (4.7.1 -> 4.8.0)
- Updating virtualenv (20.24.3 -> 20.24.5)
- Updating black (23.7.0 -> 23.9.1)
- Updating mypy (1.5.1 -> 1.6.0)
- Updating pre-commit (3.3.3 -> 3.5.0)
- Updating pytest (7.4.0 -> 7.4.2)
- Updating types-requests (2.31.0.2 -> 2.31.0.9)

- Update dependencies (Werkzeug=2.3.7, Flask=2.3.3, ...)

- minor improvements

- Improve documentation for Authenticator and rename to BrokerAuthenticator. Keep old names for now.