ParBayesianOptimization uses deprecated ggplot2 function aes_string()

[ellisdoro]

I get the following warning when using ParBayesianOptimization

aes_string() was deprecated in ggplot2 3.0.0.
ℹ Please use tidy evaluation idioms with aes().
ℹ See also vignette("ggplot2-in-packages") for more information.
ℹ The deprecated feature was likely used in the ParBayesianOptimization package.
Please report the issue at https://github.com/AnotherSamWilson/ParBayesianOptimization/issues.
This warning is displayed once every 8 hours.
Call lifecycle::last_lifecycle_warnings() to see where this warning was generated.