rmdcheck warnings on macos

[jayhesselberth]

rcmdcheck fails on macos-latest because of these warnings:

Warning: Found the following significant warnings:
  Warning: namespace ‘rgdal’ is not available and has been replaced
  Warning: namespace ‘DBI’ is not available and has been replaced

My impression from reading around is that this may be because these packages were loaded at the time the package rda files (data/vdj_so.rda etc) were created and saved. But these pacakges aren't available during build, hence the warning.

We can try to rebuild the data files to fix.

Also not clear to me why this only happens on macos-latest but is fine on ubuntu

[sheridar]

I have to rebuild the data files anyways so the meta.data columns in the objects are up to date

[sheridar]

Rebuilt the data files in #126, still seeing the DBI error