Feature/update dependencies and cache config

[isakruas]

Currently, the project relies on outdated test and documentation dependencies, which can lead to compatibility issues. Additionally, there's no way to configure the LRU cache size dynamically, limiting flexibility.

This feature updates the test and documentation dependencies to their latest versions, enhances the test coverage for the code, and introduces an option to configure the LRU cache size via an environment variable. This would improve the project's reliability and allow for better performance tuning.

One alternative considered was manually updating dependencies without expanding test coverage or allowing cache configuration. However, this would not address the underlying issues effectively.

These changes are intended to enhance the overall performance and maintainability of the application.