Mourner Robust Predicates Versions Save

• Potentially improve orient2d performance. #7
• 100 bytes smaller min-gzipped bundle.

Add TypeScript types to the NPM package.

• Switch to native ES modules for Node, requiring v12+.
• Add a repository field to package.json.

• ~10% faster orient2d.
• ~10% smaller gzipped bundle.
• Simplified the code a lot.

Simplify code, reduce bundle size by ~18%.

Fix insphere for the most difficult cases that need exact computation.

Flip the y axis so that it's oriented from top to bottom (by modern conventions), reversing the signs of orient2d & insphere.

• Added orient2dfast, orient3dfast, incirclefast, inspherefast (non-robust, approximate versions of predicates)
• Added TypeScript definitions.

Complete the port, adding orient3d and insphere.

Initial release with 2D predicates — orient2d and incircle.