Swift Package Manager correct adaptation

[TomchyshenDenys]

Issues resolved for Xcode 13:

1. Resolved warning related to missing resource according to the path Source/PhotoSlider.xcassets, but it was located at Source/PhotoSlider/PhotoSlider.xcassets
2. Changed the way of fetching Kingsfisher dependency from SSH to HTTPS. As not every dev has set up ssh configuration to GitHub therefor it's good practice to use HTTPS that ain't constrained developers

[a7ex]

It would be great, if this PR could be merged soon. Please... :-)

[TomchyshenDenys]

@nakajijapan Good day! Sorry for so many commits, SPM works not really great with forks and it was difficult to fix it through fork
Could you please review and merge it? It relates only to Swift Package

[a7ex]

@nakajijapan Good day! Sorry for so many commits, SPM works not really great with forks and it was difficult to fix it through fork
Could you please review and merge it? It relates only to Swift Package

I tried indeed as well by forking the repo and found out, that it is hard to impossible to make it work for target platform <iOS 13, therefore you can count me out of people waiting for this change ;-)
It is the last library which prevents me from getting rid of cocoapods altogether, but now I will simply replace the whole thing by my own code. What it was used for in the app I am working on, is so trivial, that it is not worth any more hassle for me :-)