Update dependencies

[fluxxcode]

• Updated python to 3.12.1
• Updated prometheus-client to 0.19.0
• Updated asterisk-ami to 0.1.7
• Updated jsonschema to 4.20.0
• Updated Docker image to use python:3.12.1-alpine
• Updated Flake8 to run on ubuntu-22.04
• Updated Flake8 to use python version 3.12.1

[fluxxcode]

On Python version 3.12.1, Python issues the following warnings in the asterisk-ami library:

asterisk-prometheus-exporter/.venv/lib/python3.12/site-packages/asterisk/ami/client.py:52: SyntaxWarning: invalid escape sequence '\.'
  asterisk_start_regex = re.compile('^Asterisk *Call *Manager/(?P<version>([0-9]+\.)*[0-9]+)', re.IGNORECASE)
asterisk-prometheus-exporter/.venv/lib/python3.12/site-packages/asterisk/ami/response.py:7: SyntaxWarning: invalid escape sequence '\-'
  key_regex = re.compile('^[a-zA-Z0-9_\-]+$')

According to the website https://adamj.eu/tech/2022/11/04/why-does-python-deprecationwarning-invalid-escape-sequence/ this is a warning that future Python versions may change to a syntax error. However, this is a bug that needs to be fixed in the asterisk-ami library. I'll leave the PR open until the warning is fixed.

[fluxxcode]

The syntax warning in the asterisk-ami library was fixed with version 0.1.7.

[denzs]

Looks good to me :)