Using the size aesthetic in this geom was deprecated in ggplot2 3.4.0

[etiennebacher]

Hi, this is a nice package!

There's a warning due to some changes in ggplot2 3.4.0 (see here):

library(ggwaffle)
#> Loading required package: ggplot2

waffle_data <- waffle_iron(mpg, aes_d(group = class))

ggplot(waffle_data, aes(x, y, fill = group)) + 
  geom_waffle()
#> Warning: Using the `size` aesthetic in this geom was deprecated in ggplot2 3.4.0.
#> ℹ Please use `linewidth` in the `default_aes` field and elsewhere instead.

^{Created on 2023-01-31 with reprex v2.0.2}

[DominiqueMakowski]

I'd like to follow-up on this, as it probably requires a fairly minor fix. @etiennebacher don't hesitate to consider making a smol PR 😁