Kinto-emailer

<!-- Release notes generated using configuration in .github/release.yml at main -->

- Enable setuptools-scm and remove useless MANIFEST.in


**Full Changelog**: https://github.com/Kinto/kinto-emailer/compare/3.0.0...3.0.1

<!-- Release notes generated using configuration in .github/release.yml at main -->
What's Changed

Breaking Changes
* Remove dependency to kinto-signer by leplatrem in https://github.com/Kinto/kinto-emailer/pull/452


Other Changes
* Build wheel on release by leplatrem in https://github.com/Kinto/kinto-emailer/pull/334
* Run functional tests with python 3.11 by leplatrem in https://github.com/Kinto/kinto-emailer/pull/443
* Group dependencies pull-requests by leplatrem in https://github.com/Kinto/kinto-emailer/pull/444
* Modernize Python packaging by leplatrem in https://github.com/Kinto/kinto-emailer/pull/451
* Get rid of tox by leplatrem in https://github.com/Kinto/kinto-emailer/pull/453

**Full Changelog**: https://github.com/Kinto/kinto-emailer/compare/2.1.0...3.0.0

**New features**

- Add ability to use settings values in placeholders (294).
For example: ``"subject": "Email from {settings[project_name]}"``

**Breaking Changes**

- Remove template variable validation

**New features**

- Allow regexp in filters values when selecting events (88)

**Internal changes**

- Get rid of ``six``