Upgrade many dependencies (#112)

Refactor for many backends (#111)

CSS selector as filter (#106)

Fix #105 (#107)

Remove experimental label from circular interpolation (#103)

Add toolpath preview on web, closes #66 (#101)

- change optimize_path_order to be a Option<bool> so we can set false or true (#99)

Experimental path reordering, closes #13 (#98)

Use geometric distance to arc instead of equal t sampling

Simplify arc_from_endpoints_and_tangents calculation

Swap to inflection points

Add a Bezier tolerance test

Revert "Use golden section search to calculate max deviation in arc flattening"

Use golden section search to calculate max deviation in arc flattening

Round gcode output within provided tolerance, fixes #34