New features:

• Improved metadata filter.
• Added release_files_retries option that allows to control how much times to retry download release files in case they are out of sync.
• Added support for aiofiles as fallback in case aiofile is not available.

Bug fixes:

• Fixed metadata filter error which lead to downloading redundant files.
• In case any mirror error occured metadata files are not moved now from skel folder to mirror folder and repository cleanup doesn't performed. A warning now printed to the log instead.

Other changes:

• Improved readme.
• idna dependency was upgraded to version 3.7 due to security issue.
• Optional dependencies now splitted off to separate requirements files.
• Fixed mirror.list example.