v2.1.0

Support for plugins. Plugins allow tdnf to modify base functionality without increasing base dependencies.
yum plugin configurations and conventions apply.

repogpgcheck plugin

repogpgcheck plugin is added to code base. repogpgcheck plugin does gpg signature check on repositories configured with repo_gpgcheck=1
please note that repogpgcheck plugin will not import public keys automatically and will require necessary pre-imported public keys for repos you intend to verify.

bug fixes

• fix error strings when interactive alter is aborted (install, update etc). now returns Operation aborted and a non zero error
• better error message if a repo directory is missing while init
• if there is an rpm read error, the corresponding file and path is printed for better debugging

build and test

• @cbsiddharth changed build to use cmake and re-wrote tests to use pytest
• @Conan-Kudo contributed by adding fedora build and test and improve ci for multiple distros