Bump version to 3.7.1
Bump version to 3.7.1

Let's follow the real GNOME versioning from now on.

GNOME/pygobject,davibe/pygobject,pexip/pygobject,sfeltman/pygobject,GNOME/pygobject,sfeltman/pygobject,davibe/pygobject,GNOME/pygobject,davibe/pygobject,davibe/pygobject,pexip/pygobject,sfeltman/pygobject,pexip/pygobject