v0.12.4

Added

• Allow paper core import in TypeScript (#1713).
• Boolean: Improve performance from O(n^2) to nearly O(n) by the use of the
  sweep and prune algorithm (#1737).
• Docs: Add support for nullable values.

Fixed

• Fix PathItem#getCrossing() to not return overlaps (#1409).
• Fix regression in Curve.getIntersections() (#1638).
• Fix edge cases in CurveLocation.isCrossing() (#1419, #1263).
• Fix SymbolItem#hitTestAll() to return only one match per symbol item
  (#1680).
• Fix handling of negative Shape sizes (#1733).
• Fix parsing of RGB Color strings with percentages (#1736).
• Fix Shape bounds when passing position in constructor (#1686).
• Prevent nested group matrix from reset when transforming parent (#1711).
• Boolean: Fix edge cases in overlap detection (#1262).
• Boolean: Add check for paths with only one segment (#1351).
• Boolean: Correctly handle open filled paths (#1647).
• Boolean: Avoid winding number edge cases (#1619).
• Docs: Fix some documentation return types (#1679).