Change image service to picsum.photos

[kp-dcyphrdigital]

Recently lorempixel.com has had lengthy downtimes and I have been using picsum.photos as a substitute. Please merge if you think this is appropriate for Faker generally.

If you want to go down a different solution path please let me know and I am happy to try implementing that.

Thanks for Faker btw, it is awesome :)

[brunogaspar]

This is half working though as the options category, word and gray needs to be properly addressed.

Both the category and word doesn't seem to be, AFAIK, allowed on picsum.photos.

The gray is just a small change on the url so it becomes https://picsum.photos/g/640/480/

[kp-dcyphrdigital]

Thanks for your input @brunogaspar. The issue with changing services is going to be the inconsistency of options. I normally use only the sizing options in my projects.

The choices here are not great - an unreliable service or a service with lesser/different options.

[fzaninotto]

Thanks, but we won't implement an alternative image formatter in the core, see #957