7.0.0 Release

Update default image to use Python 3.12.1 **bookworm** image.

As well as deprecate `py37` flavour, bye, bye, ole sport!

- **BREAKING CHANGE:** Use Python 3.12.1 as base image
- **BREAKING CHANGE:** Use **bookworm** Debian **for all active flavours** instead of _bullseye_
- **BREAKING CHANGE:** Discount `py37` flavour
- Update `py311` image to Python 3.11.7
- Update `py310` image to Python 3.10.13
- Update `py39` image to Python 3.9.18
- Update `py38` image to Python 3.8.18
- Update pip to 23.3.2
- Update pipx to 1.4.3
- **POSSIBLE BREAKING CHANGE:** Update poetry to 1.7.1
- Update tox to 4.12.1
- Update virtualenv to 20.25.0

7.0.0 Release py312 Flavour

Update default image to use Python 3.12.1 **bookworm** image.

- **BREAKING CHANGE:** Use Python 3.12.1 as base image
- Update pip to 23.3.2
- Update pipx to 1.4.3
- **POSSIBLE BREAKING CHANGE:** Update poetry to 1.7.1
- Update tox to 4.12.1
- Update virtualenv to 20.25.0

7.0.0 Release py311 Flavour

Update default image to use Debian **bookworm**.

- **BREAKING CHANGE:** Use **bookworm** Debian **for all active flavours** instead of _bullseye_
- Update `py311` image to Python 3.11.7
- Update pip to 23.3.2
- Update pipx to 1.4.3
- **POSSIBLE BREAKING CHANGE:** Update poetry to 1.7.1
- Update tox to 4.12.1
- Update virtualenv to 20.25.0

7.0.0 Release py310 Flavour

Use Debian **bookworm**.

- Update `py310` image to Python 3.10.13
- Update pip to 23.3.2
- Update pipx to 1.4.3
- **POSSIBLE BREAKING CHANGE:** Update poetry to 1.7.1
- Update tox to 4.12.1
- Update virtualenv to 20.25.0

7.0.0 Release py39 Flavour

Use Debian **bookworm**.

- Update `py39` image to Python 3.9.18
- Update pip to 23.3.2
- Update pipx to 1.4.3
- **POSSIBLE BREAKING CHANGE:** Update poetry to 1.7.1
- Update tox to 4.12.1
- Update virtualenv to 20.25.0

7.0.0 Release py38 Flavour

Use Debian **bookworm**.

- Update `py38` image to Python 3.8.18
- Update pip to 23.3.2
- Update pipx to 1.4.3
- **POSSIBLE BREAKING CHANGE:** Update poetry to 1.7.1
- Update pre-commit to 3.5.0
- Update tox to 4.12.1
- Update virtualenv to 20.25.0

6.2.0 Release

- Update `py311` image to Python 3.11.1
- Update `py310` image to Python 3.10.9
- Update `py39` image to Python 3.9.16
- Update `py38` image to Python 3.8.16
- Update `py37` image to Python 3.7.16
- Update pip to 22.3.1
- **POSSIBLE BREAKING CHANGE:** Update poetry to 1.3.1
- Update pre-commit to 2.21.0
- **POSSIBLE BREAKING CHANGE:** Update tox to 4.2.6
- Update virtualenv to 20.17.1

6.2.0 Release Python 3.11 Flavour

- Update `py311` image to Python 3.11.1
- Update pip to 22.3.1
- **POSSIBLE BREAKING CHANGE:** Update poetry to 1.3.1
- Update pre-commit to 2.21.0
- **POSSIBLE BREAKING CHANGE:** Update tox to 4.2.6
- Update virtualenv to 20.17.1

6.2.0 Release Python 3.10 Flavour

- Update `py310` image to Python 3.10.9
- Update pip to 22.3.1
- **POSSIBLE BREAKING CHANGE:** Update poetry to 1.3.1
- Update pre-commit to 2.21.0
- **POSSIBLE BREAKING CHANGE:** Update tox to 4.2.6
- Update virtualenv to 20.17.1

6.2.0 Release Python 3.9 Flavour

- Update `py39` image to Python 3.9.16
- Update pip to 22.3.1
- **POSSIBLE BREAKING CHANGE:** Update poetry to 1.3.1
- Update pre-commit to 2.21.0
- **POSSIBLE BREAKING CHANGE:** Update tox to 4.2.6
- Update virtualenv to 20.17.1