ggplot2 warning when running README example

[bpbond]

Running the first example in the README produces a warning from ggplot2:

> ggraph(pa,layout = "nicely")+
+     geom_edge_link0(width=0.2,colour="grey")+
+     geom_node_point(col="black",size=0.3)+
+     theme_graph()
Warning message:
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.
This warning is displayed once every 8 hours.
Call `lifecycle::last_lifecycle_warnings()` to see where this warning was
generated. 

Noted as part of openjournals/joss-reviews#5238

[bpbond]

(I recognize this is being generated by ggraph::ggraph, not this package, just logging it.)

[schochastics]

Yes this is a long standing issue of ggraph because of changes of ggplot2. Feel free to reopen but I close this here, given that it is an independent issue