Add main field to package.json for compatibility

[Baune8D]

Linting with eslint-plugin-import currently breaks with the error Unable to resolve path to module 'ava' import/no-unresolved when importing using CommonJS.

Since this package officially still supports CommonJS, adding back the main field will help with compatibility, and fix the above error.

[sindresorhus]

exports works for CommonJS too. This is a problem with eslint-plugin-import.

[Baune8D]

exports works for CommonJS too. This is a problem with eslint-plugin-import.

Let me just refer to your answer on another thread chalk/chalk#536 (comment) were you mention main being useful for backwards compatibility with CommonJS, which is my point with this PR since ava does still support CommonJS officially.

But i do also understand your point that this should ultimatly be fixed in eslint-plugin-import, so just reject this PR if you wanna stand by that decision 👍 This just seems like an easy fix with no real downsides for now 🙂

[novemberborn]

As far as I can tell, we've never had a main, and the exports were introduced in March 2021 #2729. Why is this an issue now?