migrate to c8

[JLHwung]

Please Read the CONTRIBUTING Guidelines
In particular the portion on Commit Message Formatting

Please check if the PR fulfills these requirements

• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes: migrate to c8
• Other... Please describe:

Does this PR introduce a breaking change?

• Yes
• No

Other information: Migrate to c8, leveraging the v8 builtin coverage tools.

[nicolo-ribaudo]

Can we setup a CI check that shows the current coverage, with codecov or something similar?

[JLHwung]

Here is the current coverage report: https://app.codecov.io/gh/babel/babel-loader

Can you install the codecov GitHub application to this repo? So the coverage should show up in checks.

[nicolo-ribaudo]

I see it as already enabled 🤔 I'll try to understand why it's not working

[nicolo-ribaudo]

Oh, it also stopped reporting the coverage in the babel/babel repo since July 5th

[JLHwung]

The coverage report now looks good to me: https://app.codecov.io/github/babel/babel-loader/commit/3ed721a5c2c0af04dbac02d3f40ce20adcba3ee5/tree/src

it also stopped reporting the coverage in the babel/babel repo since July 5th

I have no idea why the codecov check is missing. Maybe the issue is on their sides.

[nicolo-ribaudo]

Codecov is back :)