Build JavaScript using Pacel

[aminya]

This speeds up the loading time by tree-shaking and prebuilding CoffeeScript

[aminya]

This does not work yet because of prebuild/node-gyp-build#22

[aminya]

I fixed the problem by setting the dist as the root folder.

[rajendrant]

I wonder if using the parcel library is not needed, if we convert the coffee (only one main file) to js.
The other changes in the PR like babel, shx, cross-env are certainly fine.

[aminya]

The main benefit of using this is to use Parcel to tree-shake the dependencies. For example, we don't use all of the original fuzzaldrin-plus. This bundles and minifies the whole thing which loads much faster.

Original size: 27.69
New size: 10.77

This is a typical performance improvement pattern we have found by testing many packages in our organization.

[aminya]

All the tests pass. I will merge this!