Update log.js to support async reporter plugins

[steveszc]

Async reporters can be easily supported by awaiting the reporter function.

Initial checklist

• I read the support docs
• I read the contributing guide
• I agree to follow the code of conduct
• I searched issues and couldn’t find anything (or linked relevant results below)
• If applicable, I’ve added docs and tests

Description of changes

Log.js can easily support sync reporter plugins by awaiting the reporter function. Currently the reporter function is called as a sync function.

Example: vfile-reporter-junit
https://github.com/kellyselden/vfile-reporter-junit/blob/master/index.js

[steveszc]

Potentially related issue comment. Unclear if the decision to have reporter plugins be sync was an intentional design decision. #62 (comment)

[remcohaszing]

I see why this is useful. The types need to be updated though.

ESLint 8 also added support for async reporters.

[steveszc]

I am getting type errors on main when I run npm test.

Not sure I can get this PR passing until main is working...

[wooorm]

Can you add a test? (https://github.com/unifiedjs/unified-engine/blob/main/test/reporting.js)

This should perhaps also be added to https://github.com/vfile/vfile/blob/03efac7cc3a67fe33bb7a0f1de29e17be322549e/lib/index.js#L46

[codecov-commenter]

Codecov Report

Base: 100.00% // Head: 100.00% // No change to project coverage 👍

Coverage data is based on head (e7fc5f9) compared to base (398ebe2).
Patch coverage: 100.00% of modified lines in pull request are covered.

❗ Current head e7fc5f9 differs from pull request most recent head cf12f6d. Consider uploading reports for the commit cf12f6d to get more accurate results

Additional details and impacted files

@@            Coverage Diff            @@
##              main       #71   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           23        23           
  Lines         2555      2555           
=========================================
  Hits          2555      2555           

Impacted Files	Coverage Δ
lib/file-set-pipeline/log.js	100.00% <100.00%> (ø)
lib/index.js	100.00% <100.00%> (ø)

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[steveszc]

@wooorm Test added and passing

[wooorm]

Thanks, released in 10.1.0!