conda update pangolin does not update pangolin-data / Documentation request

[imLew]

I recently ran into the problem of having an outdated version of pangolin-data because I had relied solely on conda update pangolin to keep pangolin updated.

I only became aware of the existence of pangolin-data because the lineage reports of my (up to date) pangolin install did not contain any recent variants. To me it was not obvious from the install, update or usage pages that this is something I had to keep in mind.

I think this is a mistake others might make as well and I have a few ideas how to solve this;

1. Bump the minor or patch version of pangolin whenever a new version of pangolin-data is released and require that newer version. This should make conda update pangolin-data automatically.
2. Make pangolin check if it is has the latest version of pangolin-data and print a warning otherwise.
3. Add note(s) to the usage and/or update pages of the documentation clarifying that pangolin --update should be run regularly.