feat: config accepts compilerBabelOptions

[semoal]

Will close #902

We won't break babel 6 users, but babel 7 could use this to modify that ASCII configuration :)

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[codecov]

Codecov Report

Merging #906 (2724e9c) into main (a3b5bcb) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #906   +/-   ##
=======================================
  Coverage   83.12%   83.12%           
=======================================
  Files          52       52           
  Lines        1570     1570           
  Branches      425      425           
=======================================
  Hits         1305     1305           
  Misses        157      157           
  Partials      108      108           

Impacted Files	Coverage Δ
packages/conf/src/index.ts	87.14% <ø> (ø)
packages/cli/src/api/compile.ts	100.00% <100.00%> (ø)

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[tricoder42]

Looks great and it'll definitely save lot of bundle size. We just officially no longer support Babel 6 since v3.

Anyway, let's keep it for other options as well 👍

[semoal]

@tricoder42 this is ready, this fixes also the catalogsMergePath warning, was just that optional ? type.

[tricoder42]

Looks good to me. Let's ship it 🚢