Allow kw in clustering

[JoranAngevaare]

_split_to_continuous did not support kwargs, we need to add that

[coveralls]

Pull Request Test Coverage Report for Build 13501738792

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
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• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 8 of 9 (88.89%) changed or added relevant lines in 1 file are covered.
• 290 unchanged lines in 10 files lost coverage.
• Overall coverage decreased (-8.9%) to 78.271%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
optim_esm_tools/analyze/clustering.py	8	9	88.89%

Files with Coverage Reduction	New Missed Lines	%
optim_esm_tools/analyze/clustering.py	1	96.51%
optim_esm_tools/region_finding/iter_ranges.py	1	97.22%
optim_esm_tools/analyze/cmip_handler.py	2	92.11%
optim_esm_tools/analyze/time_statistics.py	4	81.36%
optim_esm_tools/analyze/xarray_tools.py	7	85.24%
optim_esm_tools/analyze/merge_candidate_regions.py	10	90.91%
optim_esm_tools/region_finding/_base.py	10	75.76%
optim_esm_tools/analyze/tools.py	23	59.24%
optim_esm_tools/analyze/find_matches.py	25	66.18%
optim_esm_tools/analyze/region_calculation.py	207	15.56%

Totals
Change from base Build 12764672925:	-8.9%
Covered Lines:	2435
Relevant Lines:	3111

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💛 - Coveralls