[DRE-maint] Bug#945481: Bump minimum version of ruby-molinillo dependency in ruby-bundler

[Andreas Beckmann]

Followup-For: Bug #945481
Control: tag -1 pending
Control: block -1 with 960020

Hi,

I've backported the fix to buster, uploaded to DELAYED/10 and filed a
buster-pu request (#960020) (the debdiff can be found there, too).


Andreas