Update poetry

[frack113]

• Update poetry
• Fix "xml.etree"
• Add pre-commit

fix regex by using r""

PS D:\rootme\py_dev\pySigma-backend-splunk> poetry run pytest
============================================================================================= test session starts ==============================================================================================
platform win32 -- Python 3.11.7, pytest-6.2.5, py-1.11.0, pluggy-1.3.0
rootdir: D:\rootme\py_dev\pySigma-backend-splunk
plugins: cov-2.12.1
collected 74 items

tests\test_backend_splunk.py .......................                                                                                                                                                      [ 31%]
tests\test_splunk_pipelines.py ...................................................                                                                                                                        [100%]

=============================================================================================== warnings summary ===============================================================================================
sigma\backends\splunk\splunk.py:48
  D:\rootme\py_dev\pySigma-backend-splunk\sigma\backends\splunk\splunk.py:48: DeprecationWarning: invalid escape sequence '\w'
    field_quote_pattern: ClassVar[Pattern] = re.compile("^[\w.]+$")

-- Docs: https://docs.pytest.org/en/stable/warnings.html
======================================================================================== 74 passed, 1 warning in 1.63s =========================================================================================