make JSX transformations (and dependencies) opt-in / lazy loaded

[thescientist13]

Type of Change

Feature

Summary

It would be nice if the opt-in feature of authoring in JSX could be more intentional in that specific dependencies could be avoided on install / consumption unless needed.

Detail

For example, a "vanilla" WCC implementation without JSX does not require

• acorn-jsx
• escodegen

Would be good to find a way to make their installation and usage within the code more opt-in. Also, as observed in ProjectEvergreen/greenwood#972, it might nice to refactor jsx-loader.js so escodegen is not a leaky abstraction.