Stripe-integration-node-typescript: Implement integration tests

[giannativo]

Describe the feature

Implement integration tests to further strengthen the API.

Use Case

The current implementation only includes unit tests, a proposed way to improve the reliability and quality of the application is to add integration tests.

Proposed Solution

No response

Other Information

No response

Acknowledgements

• [ ] I may be able to implement this feature request
• [ ] This feature might incur a breaking change

Version used

main branch

Environment details (OS name and version, etc.)

general use