[feature extractor] ios safari issue (FeatureExtractor example)

[Acool13-shi]

Hello, please fix the problem with this example in iOS, I can't train models and start prediction. I can’t give you the logs now, but I tested it on iOS12 (iPhone 5S) and iOS13(iPhone XS), this examples didn’t work. On android its working perfectly! It is a matter of life and death for me HELP
Links:
https://github.com/ml5js/ml5-examples/tree/development/p5js/FeatureExtractor/FeatureExtractor_Image_Classification
https://github.com/ml5js/ml5-examples/tree/development/javascript/FeatureExtractor/FeatureExtractor_Image_Classification

[joeyklee]

Making a note that this is related to #194

• also making a note to include in the Code of Conduct notes about how to best communicate within github issues as well as how to ask for help.

[bomanimc]

Merging this issue into #194

[bomanimc]

Duplicate of #194