Bump version to 19.2.2
Bump version to 19.2.2

pfmoore/pip,sbidoul/pip,xavfernandez/pip,pfmoore/pip,pypa/pip,pradyunsg/pip,xavfernandez/pip,sbidoul/pip,pradyunsg/pip,pypa/pip,rouge8/pip,xavfernandez/pip,rouge8/pip,rouge8/pip