fix(babel): enable polyfilling of proposal supported by core-js

[clarkdo]

Types of changes

• Bug fix (a non-breaking change which fixes an issue)
• New feature (a non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Description

Fix nuxt/create-nuxt-app#680

We're not polyfilling proposals like Promise.allSettled, this pr is enabling it and the polyfills will be imported they are used in each file.

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly. (PR: #)
• I have added tests to cover my changes (if not applicable, please state why)
• All new and existing tests are passing.

[codecov-io]

Codecov Report

Merging #8545 (87f595e) into dev (b4663d2) will decrease coverage by 0.03%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##              dev    #8545      +/-   ##
==========================================
- Coverage   67.57%   67.53%   -0.04%     
==========================================
  Files          91       91              
  Lines        3907     3909       +2     
  Branches     1079     1080       +1     
==========================================
  Hits         2640     2640              
- Misses       1020     1021       +1     
- Partials      247      248       +1     

Flag	Coverage Δ
unittests	67.53% <0.00%> (-0.04%)	⬇️

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Impacted Files	Coverage Δ
packages/babel-preset-app/src/index.js	0.00% <0.00%> (ø)

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[pi0]

Proposal syntaxes are marked as proposal since they might be removed, changed and there is no widely support (ide, parsers and probably alternative transpilers like esbuild). Is there any reason we enable by default?

[clarkdo]

@pi0 This is not babel proposal option, this is for corejs which includes Stage 4 proposals (Finished) like Promise.all and Promise.allSettled, so I think it makes sense to have them imported.