Add missing modules to testsuite's other-modules
Add missing modules to testsuite's other-modules

GHC 8.2.1 now warns about this via `-Wmissing-home-modules`

snapframework/snap-core,23Skidoo/snap-core,snapframework/snap-core,23Skidoo/snap-core,snapframework/snap-core,23Skidoo/snap-core