Add project.json#types to postcss-preset-env/package.json

[raypatterson]

When using this plugin in a postcss.config.*ts file with TypeScript tsconfig.json#compilerOptions.moduleResolution not set to honor package.json#exports the import is package.json#module for which no project.json#types are provided..

This seems to fix the issue:

# postcss-preset-env/package.json
{
    ...
    "main": "dist/index.cjs",
    "module": "dist/index.mjs",
+   "types": "./dist/index.d.ts",

[romainmenke]

Hi @raypatterson ,

That is not a bug.
We do not support types for commonjs.

see :

• packages provide wrong types under node16 module resolution #1031 (comment)
• If tsconfig.json is set to CommonJS mode, the declaration files cannot be read. #1303
• TypeScript error after upgrading postcss-preset-env from 9.3.0 to 9.4.0  #1295
• postcss-color-functional-notation doesn't expose TS types for CJS export #1217
• Postcss-nesting v12.0.4 is missing types field in package.json #1313