Parallelize package builds across available cores

[kasperisager]

With the changes introduced in ff80be7, packages no longer use a shared workspace when performing full builds. As such, we now have the option to parallelize package builds across the available cores of the host system. By using the cluster module, we can create a number of process forks, each of which will handle the compilation of packages handed to them by the master process.

Do be aware of dependencies between packages! Hint: https://cs.stackexchange.com/questions/2524/getting-parallel-items-in-dependency-resolution/2525#2525

[Bugvi-Benjamin-M]

If you will let me, I would love to have a look at this. If only to give it a shot, fail miserably and have a few laughs.

[kasperisager]

Go for it! 👍

[kasperisager]

This may or may not be impacted by #98.

[kasperisager]

Putting this on hold for now.

[kasperisager]

In light of #170 I'll close this.

[kasperisager]

This is now part of the TypeScript 3.9 iteration plan: microsoft/TypeScript#30235