Allow SVG as an image upload

By default Supermodel does not allow you to upload an SVG into an image field type, but you can allow this by adding configuration for that field to specify all the allowed types:

allowedTypes=image/gif
allowedTypes=image/jpeg
allowedTypes=image/png
allowedTypes=image/svg+xml
allowedTypes=image/webp

Note that you can't only add the missing SVG type, you must include all the types that you want available.