Update pygithub from 1.44.1 to 1.45 (#1321)
Update pygithub from 1.44.1 to 1.45 (#1321)

Co-authored-by: Fábio Rosado <504d498c4e6912c88badf931727242f17b94f32f@gmail.com>

FabioRosado/opsdroid,opsdroid/opsdroid,jacobtomlinson/opsdroid