Try out Yarn instead of npm

Description

Yarn appears to address npm's most important shortcomings: reproducibility, security and performance. It's still pretty new, but given our problems with npm, I think we should give it a try.

Official announcement: https://code.facebook.com/posts/1840075619545360

A comparison: https://www.sitepoint.com/yarn-vs-npm/

Notes:
Timebox this to 3 days

Status

Assignee

Alex Eng

Reporter

Sean Flanigan

Tested Version/s

None

Story Points

2

Epic Link

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