deb: pkg-resources is a runtime-dependency

otherwise:
Traceback (most recent call last):
  File "/usr/bin/intelmqcbmail", line 6, in <module>
   from pkg_resources import load_entry_point
ModuleNotFoundError: No module named 'pkg_resources'

Author: wagner-intevation

debian/control

@@ -8,7 +8,7 @@ Standards-Version: 3.9.5.0
 Package: intelmq-mailgen
 Architecture: all
 Depends: ${misc:Depends}, python3-psycopg2, python3 (>=3.6),
- gnupg (>2.2), python3-gpg
+ gnupg (>2.2), python3-gpg, python3-pkg-resources
 Recommends: pinentry-curses
 Breaks: intelmq (<< 1.0.0~dev6+intevation.1.2~rc1)
 Description: Generate and send emails using data from the IntelMQ ContactDB.