feat: remove is-builtin-module dependency

[43081j]

Node provides a list of built ins via builtinModules. We can test against this rather than including an extra (redundant) dependency.

In future, if we introduce a version constraint of node >=16, we can use isBuiltin which node provides:

import {isBuiltin} from 'node:module';

isBuiltin('fs'); // true

[thecrypticace]

Thanks!