github actions - macOS-latest (release) - fail

[talgalili]

See:
https://github.com/talgalili/heatmaply/actions/runs/3210048770/jobs/5247221823

Due to:

Warning: Warning in strwidth("w") : no font could be found for family "Arial"
Warning: Warning in strheight("x") : no font could be found for family "Arial"

Not clear.

@alanocallaghan - any thoughts?

[alanocallaghan]

I think the failure is down to polygon edge not found which I've seen before in another package but never gotten to the bottom of - I gave up

May be related to this? tidyverse/ggplot2#2252

I don't think the Arial thing is relevant but maybe we can could run theme_set with a different font family for the tests/vignette