BUG: WEC from impedance with more than one DOF

[cmichelenstrofer]

Description

Fixes #439

Type of PR

• Bug fix
• New feature
• Documentation
• Other: (specify)

Checklist for PR

• Authors read the contribution guidelines
• The pull request is from an issue branch (not main) on your fork, to the dev branch in WecOptTool.
• The authors have given the admins edit access
• All changes adhere to the style guide including PEP8, Docstrings, and Type Hints.
• Modified the documentation if applicable
• Modified or added a new test
• All tests pass
• Reference or close any relevant issues

Additional details

Include any relevant context and describe any validation and verification efforts.

[coveralls]

Pull Request Test Coverage Report for Build 18383473295

Details

• 76 of 79 (96.2%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.08%) to 93.899%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
wecopttool/core.py	1	2	50.0%
tests/test_integration.py	75	77	97.4%

Totals
Change from base Build 17801806891:	0.08%
Covered Lines:	2832
Relevant Lines:	3016

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💛 - Coveralls

[jtgrasb]

Just reviewed this and made a small update to the kinematics matrix to get the tests to pass. Looks ready to merge.