Minimum ggplot2 version #448

Dear @thomasp85 ,

I had an error when trying to install patchwork from CRAN with ggplot2 3.5.1 allready installed (on R 4.4.0). The new version of patchwork imports is_ggplot() from ggplot2 but this function is exported only starting from version 3.5.2, and patchwork depends on ggplot2 >= 3.0.0 only. Would it be possible to modify the minimum required ggplot2 version with 3.5.2 to avoid this error?

Best regards,

Hugo