Allow users to specify where they want to store the cache instead of having it hardcoded

[kamath]

It seems like a cache directory is created even when caching is disabled. This can become a problem when the library is used in an environment where mkdir is not possible. In the long term, it probably makes sense to allow the users to connect to some external storage / database? In the short-term, would it be possible to allow the users to specify where they want to store the cache instead of having it hardcoded?

[its-jz]

Addressed not creating a new directory when enableCaching is set to false here #191