Remove extra dimension in waves DataArray

[michaelcdevin]

Description

Resolves #364. The try/except clause allows for environments with older versions of xarray to still be supported.

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.
• All tests pass
• Reference or close any relevant issues

[coveralls]

Pull Request Test Coverage Report for Build 10218544388

Details

• 2 of 4 (50.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.008%) to 94.642%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
wecopttool/core.py	2	4	50.0%

Totals
Change from base Build 9895751740:	0.008%
Covered Lines:	2773
Relevant Lines:	2930

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💛 - Coveralls