Roxygen2 v7.1.0 bump

[istfer]

We are but it may be time to change that. If someone wants to take it on before I can, the process is basically:

• pick a date for the update and warn everyone
• ideally close out as many open PRs as possible before then, to minimize merge conflicts
• install the newest Roxygen on your dev machine
• git pull, make sure your tree is clean, then make clean && make document
• commit all the changed Rd and DESCRIPTION files
• grep -R 7.0.2 . -> review, update appropriately, commit. I think at least three scripts scripts/travis/install.sh, .github/workflows/styler-actions.yml, and docker/depends/Dockerfile will need updating, but I may be forgetting others.
• push, review, merge
• remind everyone to update Roxygen on their own machine
• monitor PRs for merge conflicts/accidental reversions (if it edits 300 files, it's probably an accidental reversion)

Originally posted by @infotroph in #2672

[istfer]

Just created this issue so that @infotroph's helpful comment doesn't get buried.

It would be nice if we can move from 7.0.2 to the most up-to-date version of Roxygen similar to what has been done before

[github-actions]

This issue is stale because it has been open 365 days with no activity.

[Aariq]

Currently using v7.1.2 of roxygen2 so closing this