fix: CJS fallbacks should be at the end not at beginning

[ghiscoding]

Description

better hybrid CJS/ESM support

Motivation and Context

when defining the old CJS main and module, these properties should come after exports (new ESM prop) so that newer NodeJS will try exports first (we shouldn't try the fallback first), while for old NodeJS it will automatically use the fallbacks since exports won't work, see this TypeScript for more info (https://www.typescriptlang.org/docs/handbook/esm-node.html)

How Has This Been Tested?

Types of changes

• Chore (change that has absolutely no effect on users)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.