Release 0.13.0

Packaging

• Drop the dependency on leapp-repository for Fedora and RHEL 8+ (#717)
• Provide builds for RHEL 7+ and Fedora (#717)
• Drop automatically generated Python dependences on RHEL 8+ and Fedora systems (#717, #716)
• Bump the provided leapp-framework capability to 2.0 (#700)

Framework

Fixes

• models: Do not make references to private symbols (#718)

Enhancements

• Introduce the LEAPP_DEVEL_DATABASE_SYNC_OFF envar to enable speed up writes into the leapp database by disabling synchronisation - only for development / testing purposes (#732)

Leapp

Fixes

• Fix print of the leapp help msg for Python 3.6+ (#731)

Enhancements

• The leapp commands are now defined/provided by leapp-repositories; leapp discovers the specified commands automatically (#700)
• Add CLI support for choices and default for options of leapp commands (#734)

Modifications

• Makefile: Added the fast_lint target to apply linters just on files different from master (#733)