Incompatibility with Python 3.9 due to Optimize.total_loss

[jsmqz]

It appears that there is an issue while using this package with Python 3.9 and the most up-to-date version of SciPy. When using this package with Python 3.9, the total_loss method in the Optimize class returns an array of [[SCALER]] when it should just return the scalar, causing the program to fail. I was able to fix this in my personal project by flattening the array but I'm unsure how it would impact others using this package. If there is interest I'm happy to upload the changes I've made.

[inventingian]

I'm having the same issue would be awesome if you could upload to fix