cad/openvsp: Update to 3.50.0

Features:

• Legacy analyses now available as Geometry Analyses — CompGeom, Planar Slice, Projected Area, Mass Properties
• Risk Angle Geometry Analysis
• AC 20-128A Rotor fragment Aux Geom
• AC 25.905-1 Thrown blade Aux Geom
• ESDU 83042a Tire spray Aux Geom
• AMC 25.734 Wheel and tire failure mode Aux Geom
• Geometry Analysis API
• FEA Poly Spar API

Fixes:

• Point gaps fixed along intersections in CFD / FEA Mesh
• Tolerance that was collapsing features and elements fixed
• Point order crash in Triangle worked around
• CFDMesh crash with symmetry plane or outer boundary
• Un-used FEA Properties no longer deleted
• Don’t crash when reading files from 3.42.0 with spaces in Set names