Update README.md

[kandikits]

Hello - request review and approval on the inclusion of Explore Swift on your list. It would be a good addition under LIBS section of this article. Would you like to include it in your list? We'd love to hear your feedback. Thanks!

• Explore Swift - Discover libraries, code snippets, top authors, trending discussions.

• Project Name:
• Project URL:
• Project Description:
• Why it should be added to awesome-swift:
• [ ] 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 🤓