Compatibility ggplot2 4.0.0

Hi there, We've been preparing a new major release for ggplot2 and found an issue during a reverse dependency check. Most of this PR is replacing deprecated functions, but the important bit is the `attr(p, "data")` change: ggplot2 now uses S7 and properties are implemented as attributes so ggplot2's `data` property was affected by this. You can test your code with the development version of ggplot2 by installing it as follows: ```r # install.packages("pak") pak::pak("tidyverse/ggplot2") ``` We aim to release the new ggplot2 version in about 2 weeks, and hope you can submit a fix to CRAN around that time or let us know when ggplot2 should change. Hopefully this will inform you in a timely manner. Best wishes, Teun