Hotfix for #86

[J-Moravec]

This fixes issues of not being able to import classes with dots in their name.

This was actually a bug where sep instead of collapse was used in a vector.

The assumption that the method can't have dot in name remains. Possible fix for that would include looking around for imported generics with dot in name and registering methods for such generics.

In the meantime, there is this hotfix.

[torfason]

Thanks for the fix! I've:

• Verified that the new test reproduces the issue
• Verified that the updates fixes the issue and the new test
• Verified that the updates cause no other tests to fail
• Merged this into both dev and main
• Updated the version to 1.3.2 and updated the site
• Sent a new release to CRAN

Hopefully this will show up an CRAN within a day or two.