add params_min/max into break point pickle

[lu-kas]

_algorithm.py:

The variables params_min/max are not stored in the break point database. As they are not recomputed after a restart they eventually may not get updated, if no new min/max was achieved in the continued run.

Could you please check if there may be other candidates like this?

[coveralls]

Pull Request Test Coverage Report for Build 878

• 0 of 4 (0.0%) changed or added relevant lines in 1 file are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-0.04%) to 89.76%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
spotpy/algorithms/_algorithm.py	0	4	0.0%
<!--	Total:	0	4	0.0%	-->

Files with Coverage Reduction	New Missed Lines	%
spotpy/algorithms/_algorithm.py	1	86.12%
<!--	Total:	1		-->

Totals
Change from base Build 877:	-0.04%
Covered Lines:	4146
Relevant Lines:	4619

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💛 - Coveralls

[thouska]

@lu-kas thx for your message, indeed these candidates were missing. So far I did not find other candidates, therefor I think we can merge your contribution and hope this is working fine now.