Pygments-promql

Minor changes

* Fix release issue https://github.com/pabluk/pygments-promql/commit/28914f8834573139b49b78104882d158692dd6f1 blocking publishing of 0.1.0 on PyPi.

Bug fixes, CI improvements or minor changes

* Update list of supported Python versions: Python 3.7 was deprecated, and support for 3.11 and 3.12 was added.
* Bump pillow from 9.3.0 to 10.0.1, for security reasons https://github.com/pabluk/pygments-promql/pull/20
* Update requirements versions https://github.com/pabluk/pygments-promql/commit/74e73d601b58f6d7395af440651dbd930491b6de

Bug fixes, CI improvements or minor changes

* Bump Pillow to 9.0.1 to fix CVE-2022-24303 and CVE-2022-22817 (13) Thanks tormath1

Bug fixes, CI improvements or minor changes

* Update list of supported Python versions, versions <=3.6 were deprecated.
* Bump pillow from 8.3.2 to 9.0.0, for security reasons
* Update pytest to 6.2.5 to support Python 3.10

Bug fixes, CI improvements or minor changes

* Fix issue with multiple comma-separated function arguments (7) Thanks to ocervell
* All Python files were reformatted using [black](https://black.readthedocs.io/en/stable/)

Bug fixes, CI improvements or minor changes

* Improve complex expression parsing (4) Thanks to ocervell
* Add Github Actions workflow to automate package publishing (6)
* Remove unsupported Python version 3.5