fix: add prefix to module names starting with digits

[tabarra]

This solves an issue when adding libraries such as @75lb/deep-merge that results in:

export * from "@75lb/[email protected]";
export { default as 75lbDeepMergeDefault } from "@75lb/[email protected]";
// Error: An identifier or keyword cannot immediately follow a numeric literal.(1351)

Checking for modules starting with a digit and prefixing them with a should solve the issue, even if not a perfect solution.
I have not tested the code.