Update Catch to 1.9.1
Update Catch to 1.9.1

This fixes a nasty bug where Catch *ignored* unexpected exceptions:
https://github.com/philsquared/Catch/issues/885 Didn't affect us
because we haven't written any new tests since upgrade to 1.9.0.

der-lyse/newsboat,x4121/newsbeuter,newsboat/newsboat,der-lyse/newsboat,newsboat/newsboat,newsboat/newsboat,newsboat/newsboat,newsboat/newsboat,newsboat/newsboat,x4121/newsbeuter,der-lyse/newsboat,der-lyse/newsboat,x4121/newsbeuter,x4121/newsbeuter,newsboat/newsboat,der-lyse/newsboat,der-lyse/newsboat,der-lyse/newsboat,der-lyse/newsboat,newsboat/newsboat