feat(init): adds 'module' field to enhancedResolve mainFields when current module is type:module

[sverweij]

Description

• If the current package.json contains a type attribute with the value module add module to the list of mainFields enhanced resolve should use in its (external) module resolution.
• Makes the default mainFields ['main', 'types', 'typings'] over just ['main'] (or a comment) as it's always useful in TypeScript project (which is likely in the majority of all JavaScript projects out there) and doesn't hurt in other contexts.

Additionally, a separate commit, outside this PR, documents the working of the mainFields attribute for ESM contexts (b92b79b)

Motivation and Context

#843

How Has This Been Tested?

• green ci
• additional automated tests

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• Documentation only change
• Refactor (non-breaking change which fixes an issue without changing functionality)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• 📖

  • My change doesn't require a documentation update, or ...
  • it does and I have updated it

• ⚖️

  • The contribution will be subject to The MIT license, and I'm OK with that.
  • The contribution is my own original work.
  • I am ok with the stuff in CONTRIBUTING.md.

[codeclimate]

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