Fix types for export on ESModule

[ani3llyon]

Fix types for export in file index.d.ts

• use typescript
• set "type": "module" in package.json or set extention file to .mts

import nodemon from 'nodemon';

// no show error on ide and also when compile the code
// but error when running
nodemon.default();

// show error on ide and also when compile the code
// but no error when running
nodemon();

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[github-actions]

🎉 This PR is included in version 3.1.7 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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