Typo adjustments, black formatting, drop Python 3.9, support Python 3.13

[Zeitsperre]

Hi there,

I couldn't help but notice a few typos when running spotpy and decided to do a very quick code cleanup. Changes in this PR are:

• Correcting spelling/grammar errors
• Configuring the package metadata to reflect the lowest-supported Python (3.9+)
• Added build tests for Python3.9 in GitHub Workflow
• Configuring black for Python3.9+
• Running python -m black over the code base
• Adding black to the code linting checks in GitHub Workflow
• Dropped support for Python3.9, extended support to Python3.13

Let me know if there are any changes you'd like me to make.

Best,

[coveralls]

Pull Request Test Coverage Report for Build 15283517039

Details

• 24 of 99 (24.24%) changed or added relevant lines in 15 files are covered.
• 14 unchanged lines in 8 files lost coverage.
• Overall coverage increased (+0.006%) to 67.799%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/spotpy/algorithms/padds.py	1	2	50.0%
src/spotpy/examples/spot_setup_hymod_exe.py	0	1	0.0%
src/spotpy/likelihoods.py	0	3	0.0%
src/spotpy/analyser.py	2	16	12.5%
src/spotpy/algorithms/efast.py	8	64	12.5%

Files with Coverage Reduction	New Missed Lines	%
src/spotpy/algorithms/abc.py	1	84.21%
src/spotpy/algorithms/padds.py	1	12.61%
src/spotpy/analyser.py	1	83.41%
src/spotpy/examples/spot_setup_ackley.py	1	0.0%
src/spotpy/examples/spot_setup_hymod_python_pareto.py	1	0.0%
src/spotpy/examples/spot_setup_standardnormal.py	1	0.0%
src/spotpy/examples/spot_setup_hymod_unix.py	2	0.0%
src/spotpy/algorithms/efast.py	6	16.67%

Totals
Change from base Build 13455084357:	0.006%
Covered Lines:	3752
Relevant Lines:	5534

---

💛 - Coveralls

[thouska]

Hi @Zeitsperre,
wow, thank you so much for your contribution to spotpy!
I checked it out and have to say it looks excellent! Thank you so much!