refactor: drop commonjs build from default setup

[satya164]

There's a possibility of dual package hazard with the current setup. Metro enables exports support from 0.82.0, so this can become a problem for some packages.

So this drops the dual package setup in favor of an ESM-only setup. To make a similar change in your package, apply the following change to your entrypoints:

-  "main": "./lib/commonjs/index.js",
+  "main": "./lib/module/index.js",a
-  "types": "./lib/typescript/commonjs/src/index.d.ts",
   "exports": {
     ".": {
-      "import": {
-        "types": "./lib/typescript/module/src/index.d.ts",
-        "default": "./lib/module/index.js"
-      },
-      "require": {
-        "types": "./lib/typescript/commonjs/src/index.d.ts",
-        "default": "./lib/commonjs/index.js"
-      }
+      "types": "./lib/typescript/src/index.d.ts",
+      "default": "./lib/module/index.js"
     }
   },

Also, remove the commonjs target from the react-native-builder-bob field in your package.json or bob.config.js or bob.config.mjs:

"react-native-builder-bob": {
  "source": "src",
  "output": "lib",
  "targets": [
    ["module", { "esm": true }],
-   ["commonjs", { "esm": true }]
    "typescript",
  ]
}

With this change, Jest will break for the consumers of your libraries due to the usage of ESM syntax. So they may need to update their Jest configuration to transform your library:

module.exports = {
  preset: 'react-native',
+ transform: {
+   'node_modules/(your-library|another-library)': 'babel-jest',
+ },
};

If consumers of your library are using it in NodeJS in a CommonJS environment, they'll need to use at least NodeJS v20.19.0 to be able to synchronously require your library.

You can read more at our ESM support docs.