CA should not overwrite library files between patch versions

[emmachughes]

When upgrading an H5P library to a new patch version, CA will overwrite files instead of generating new ones. This has given us some headaches with a caching proxy in the past (#1250).

It costs next to nothing to write new files for each patch version, and will completely sidestep any issues with browser caches, caching proxies, CDNs, etc. While we've fixed the issue on our end, we intend for Edlib to run on-premise, and it'd be nice if the caching problem just did not exist by default.

[chrieinv]

Since the update of H5P Core and Editor, PR #2291, patch version is a part of the folder name. Patch updates no longer overwrites existing files but are written to a new folder, the old folder is then removed.

[emmachughes]

This has been solved since ages ago.