theme_trr.R `size` argument is deprecated

[arndtupb]

theme_trr() calls the size argument of element_line multiple times, e.g. in:

treat/code/R/theme_trr.R

Line 25 in 1a95b1a

text = element_text(size = text_size),

ggplot2 recommends against using size and recommend linewidth instead:
The size argument of element_line() is deprecated as of ggplot2 3.4.0.
Please use the linewidth argument instead.

should theme_trr.R be updated? If so, in this repo?