Don't clobber RuboCop's default excludes
Don't clobber RuboCop's default excludes

By default, adding an exclude (faffc49) has the effect of removing the
default excludes. Merge them as described in rubocop-hq/rubocop#6567.

SeaGL/osem,differentreality/osem,SeaGL/osem,openSUSE/osem,openSUSE/osem,AndrewKvalheim/osem,AndrewKvalheim/osem,hennevogel/osem,differentreality/osem,AndrewKvalheim/osem,hennevogel/osem,hennevogel/osem,openSUSE/osem,hennevogel/osem,SeaGL/osem,differentreality/osem,differentreality/osem