fix: remove ESM package.json declaration (fixes 'Element' is not exported from '@prismicio/richtext')

[angeloashmore]

Types of changes

• Chore (a non-breaking change which is related to package maintenance)
• 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

This PR removes the explicit ES Module declaration by removing "type": "module" from package.json.

Declaring the package as an ES Module has caused issues in the following circumstances:

• Next.js on Vercel: The entry file must use the .mjs extension to resolve correctly during server-rendered requests. This causes issues in build systems that do not recognize .mjs (e.g. Create React App). This only happens when deployed to Vercel in production. (See Prismic preview crashing in Next.js production with 500 error #108)
• Create React App 4: .mjs files are unsupported. It works with a .js file extension, which breaks Next.js support.
• Create React App 5: .mjs with "type": "module" is supported, but breaks backwards compatibility with CRA 4.

The most straightforward solution that ensures everything works out-of-the-box is to remove "type": "module" from package.json. When the ecosystem is more aligned behind ESM, we can restore it to a proper ES Module.

Fixes #117

Checklist:

• My change requires an update to the official documentation.
• All TSDoc comments are up-to-date and new ones have been added where necessary.
• All new and existing tests are passing.

🙃

[codecov-commenter]

Codecov Report

Merging #122 (1b16476) into master (27c502f) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #122   +/-   ##
=======================================
  Coverage   92.25%   92.25%           
=======================================
  Files          16       16           
  Lines         271      271           
  Branches       60       60           
=======================================
  Hits          250      250           
  Misses          5        5           
  Partials       16       16           

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[github-actions]

size-limit report 📦

Path	Size
dist/index.mjs	0 B (-100% 🔽)
dist/index.cjs	5.74 KB (0%)
dist/index.js	4.08 KB (+100% 🔺)