Add YouTubeKit

[b5i]

• Project Name: YouTubeKit
• Project URL: https://github.com/b5i/YouTubeKit
• Project Description: A way to interact with YouTube's API (without any API key!)
• Why it should be added to awesome-swift: YouTubeKit allows for a very easy use of YouTube's API to build any YouTube-related project
• At least 15 stars (GitHub project)
• Support Swift 5
• Updated contents.json instead of README
• Lib is fully open sourced, written in Swift and not a wrapper over compiled lib
• Description does not say "written in Swift" or variant 🤓

[matteocrippa]

@b5i looks good, do you mind just update the info in the PR comment that are missing?

[b5i]

@b5i looks good, do you mind just update the info in the PR comment that are missing?

Oh yeah didn't see the fields, done!

[vpeschenkov]

@b5i thanks!