feat: Lower dependency floors to actual minimums

[HenrikSpa]

The dependencies are unnecessary high (especially Numpy) which creates conflict with other python tools.

gwrefpy/pyproject.toml

Lines 21 to 26 in 826f7a2

	dependencies = [
	"matplotlib>=3.10.5",
	"numpy>=2.3.2",
	"pandas>=2.3.2",
	"scipy>=1.16.1",
	]

I suggest lowering them as the real minimum requirements are (currently) much lower.

I run the test suite with these versions with 79/79 passed:

dependencies = [
      "matplotlib>=3.6.3",
      "numpy>=1.24.4",
      "pandas>=2.2.1",   # 2.2.0 broken: string-offset comparison in timeseries.py
      "scipy>=1.10.1",
  ]

[eriktoller]

@HenrikSpa thank you for the suggestion. I will verify and implement the changes.