v0.3.1
Updates:
Added AdditiveArithmetic to RelatableValue and Vector2Algebraic
Added .mixed to RelatableValue so that they could be added, subtracted, or negated
Added functions to add, subtract, negate, etc RelatableValue
Added functions to multiply or divide RelatableValue by a CGFloat
Bugfixes:
Fixed negative depth notches so they flip into tabs instead of shifting inwards.