Redis-dict

Many thanks to Pydes-boop for discovering that redis-dict had almost complete compatibility with dictionaries. However, full compatibility was not in place due to the existing legacy Python2 thunder methods. Subsequently, Pydes-boop also resolved the issue perfectly with the most appropriate changes, and demonstrated behaviour equivalence with tests. Thanks a bunch.

* Updated to python3 eq and neq comparison operators Pydes-boop
* Changed typing for compatibility with Python 3.9 Girgitt
* Small update for readme
* Bump cryptography from 42.0.2 to 42.0.4 for test requirements


Additionally, a small thank you to Girgitt for drawing attention to the issue of backward compatibility.

updated readme, test-requirement bump

Added datetime timedelta for expiration during initialization and within the context manager.
Bumped the test-requirement version of cryptography.
Great thanks to Pydes-boop for incorporating timedeltas for expiration during initialization and in the context manager.

passed:

mypy --strict redis_dict.py
pylama redis_dict.py -i E501

Added Redis configuration example to Readme
Updated "how to" with Redis configuration

* Setup guide for Redis encryption.
* Minor wording changes to the README for improved clarity.
* An example illustrating the use of 'preserve timeout' for keys, developed in collaboration with cterrazas2."

* bumped package versions for security
* small update for readme