Moorpy update

[gbarter]

Purpose

This brings in recent updates from MoorPy, including the ability to set line elastic properties from a type string and diameter instead of the user having to specify them and developing coefficients that scale with diameter^2. With the MoorPy updates, I then tried to tie up some additional loose ends in FloatingSE structural analysis for WEIS.

Type of change

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (non-backwards-compatible fix or feature)
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no API changes)
• Documentation update
• Maintenance update
• Other (please describe)

Testing

• I have run existing tests which pass locally with my changes
• I have added new tests or examples that prove my fix is effective or that my feature works
• I have added necessary documentation

[ptrbortolotti]

Thanks GB!