v3.6.0

Cachex v3.6.0 is a small feature release with improvements to fallback caching.

Fixes:

• Fixed a wrong definition in TTL documentation.

Improvements:

• Added support for setting expiration inside fetch/4.
• Added support for setting expiration inside get_and_update/4.
• Removed unnecessary macros in cache action handling.
• Simplified evented vs. scheduled LRW interfaces.
• Updated documentation alongside fetch/4 changes.

Please let me know if you find any issues or have any suggestions!