Fix ray shooting in case of touching faces

What's Changed

• Fixes #171 infinite loop when calling unify for multipolygon with touching faces (case 1 and 2) by @axtavt in #173
• Fix ray shooting algorithm in case of multipolygon with touching faces by @alexbol99 in #174

New Contributors

• @axtavt made their first contribution in #173

Full Changelog: v1.5.1...v1.5.2