Fix the package file cjs entry reference

[pleb]

Note

The build is failing due to vulns being found in the audit step. PR #157 addresses this.

Main

The output configuration using Rollup is

  output: [
    {
      dir: 'dist',
      format: 'cjs',
      entryFileNames: '[name].js',
      preserveModules: true,
      sourcemap: true,
      dynamicImportInCjs: false,
    },
    {
      dir: 'dist',
      format: 'es',
      entryFileNames: '[name].mjs',
      preserveModules: true,
      sourcemap: true,
    },
  ],

As you can see, ESM gets the mjs extension. However, CJS keeps the traditional js extension.

However, in the package file

  "type": "module",
  "module": "index.mjs",
  "types": "index.d.ts",
  "main": "index.cjs",

you will notice the main import is referencing the cjs extension.