Pin versions of essential packages
Pin versions of essential packages

In essence, Robot Framework packages and buildout-related packages,
including `setuptools` as a dependency of `zc.buildout`.

Rzaporozhets/robot_tests,bubanoid/robot_tests,kosaniak/robot_tests,cleardevice/robot_tests,SlaOne/robot_tests,openprocurement/robot_tests,selurvedu/robot_tests