Fix a rare edge case manifesting on polygons with a big number of points. #186

• Fix edge cases related to touching inner rings. #177
• Slightly improve performance. #177

Thanks to @msbarry for these contributions!

• ⚠️ Breaking: publish earcut as a ES module, dropping support for CommonJS (use v2.2.4 if you need compatibility).
• ⚠️ Breaking: use modern ES syntax, dropping support for IE11 (you can still transpile on your end to keep support).
• ⚠️ Breaking: the legacy UMD browser bundle now exposes the main function as earcut.default.

Changelog for previous versions