fix: #284 ignore javascript from sucrase transformations

[thescientist13]

Related Issue

resolves #284

Summary of Changes

1. ignore javascript from sucrase transformations

TODO

1. Greenwood testing

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Since Acorn uses fs.readFile and execution happens with import, there is an inherit gap where-in other file types can be imported in a file, but not processed correctly, by either WCC or WCC + Greenwood. Will probably need to find a solution for this long term.

[thescientist13]

So just a callout here that there is a slight dis-connect this issue revealed, in that to parse JavaScript, we have to read the file from disk, which is different from how it gets executed, with import.

This means any framework processing of custom extensions, would have its source fed right to Acorn, which could break if it's non-standard JavaScript syntax. However, if a user has custom loader hooks setup, it would still work when executed. Something we should probably track as an issue to try and reconcile somehow.

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As it relates to this change, this more formally "locks" in WCC to just the following extensions

• JavaScript - .js, .mjs, .cjs
• TypeScript / JSX - .ts, .jsx, .tsx

edit: there's already a discussion for this - #226