elara v0.5.4

Description :

• Elara can now support keys of any type, not just strings!

• New ttl and ttls functions to retrieve time to live for all cache objects

• A new persist function to persist a key that previously had an expiry.

• Added linsert for lists and randomkey to fetch any random key from the database.

v0.5.4 out now on pypi! No breaking changes.

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