chore(all): merge master into V3

[platypii]

Merge master into V3 branch. These are nice changes, we should include them on the V3 branch.

This includes changes from ee91f146 to b7e31802 which are all the commits to master since V3 was forked from commit ee91f146.

Changes include:

• cli options for multi part models
• x3d-serializer fixes
• performance and usability tweaks to modeling
• svg-deserializer fix
• more bezier functions
• extrudeHelical

In the merge I had to port a bunch of these to ES modules, and fix the tests.

All Submissions:

• [x] Have you followed the guidelines in our Contributing document?
• [x] Have you checked to ensure there aren't other open Pull Requests for the same update/change?
• [x] Does your submission pass tests?

[z3dev]

@platypii cool! This will bring V3 up to the latest changes, and provide a nice starting point for 'alpha' versions.

it may take a few days to complete the reviews.

[platypii]

Reverted the changes in dist, and addressed your other comments. Good catches thanks.

[platypii]

In the future, when its a branch merge like this, we should merge the commits in without "squash and merge". By squashing, git doesn't realize that master and V3 got synchronized, and lost track of the merge history :disappointed: