v0.15.2

ParametricOptInterface v0.15.2

Diff since v0.15.1

Merged pull requests:

• VectorQuadratic as VectorAffine (#231) (@joaquimg)
• More homogeneous code (#232) (@joaquimg)
• More efficient cubic functions (#233) (@joaquimg)
• Fixes in cubic and constraint interpretation (#234) (@joaquimg)
• Improve VectorQuadraticFunctions (#235) (@joaquimg)
• Add docs to internal functions (#236) (@joaquimg)
• More unit tests (#237) (@joaquimg)
• Prep for v0.15.2 (#238) (@joaquimg)