Consider using a different library for boolean operations

[sprocketc]

We currently use paper.js to apply boolean operations to paths. We should consider using a more concise/functional library, and eventually remove paper.js from our depemdencies. The following deps can also be removed afterwards

• assert
• constants
• events
• graceful-fs
• path

Probable alternatives

• https://github.com/iShape-Rust/iShape-js
• https://github.com/r-flash/PathBool.js