Python >= 3.7 and Django > 2.0 Support

Thanks to @dyus easy_cache now supports Python 3.10 and Django 3-4

Bug fixes and documentation improvements

Fixes #8: cache invalidation for property does not work if cache key …

…contains any parameter

Release v0.6.0: cache refresh and Django 1.11 support

• Now tests are passed in Python 3.6 + Django 1.11 environment.
• refresh_cachemethod added to refresh cached value

Release v0.5.0

• Tests moved to separate folder and adapted for redis/memcached in docker
• Abstract cache instance class and client class for redis
• versioneer added
• Some fixes and compatibility changes
• Removed support for python 3.4 and Django 1.7
• Added support for python 3.6 and Django 1.10