5.2.0: Updates deployment targets for CocoaPods

What's Changed

Update README for Swift Package Manager installation by @mlorincz in https://github.com/RNCryptor/RNCryptor/pull/297
Add link to the dart implementation of RNCryptor by @tzraikov in https://github.com/RNCryptor/RNCryptor/pull/298
Raise all deployment targets to the min versions required by Xcode 14 by @ale-gen in https://github.com/RNCryptor/RNCryptor/pull/306

@mlorincz made their first contribution in https://github.com/RNCryptor/RNCryptor/pull/297
@tzraikov made their first contribution in https://github.com/RNCryptor/RNCryptor/pull/298
@ale-gen made their first contribution in https://github.com/RNCryptor/RNCryptor/pull/306

Full Changelog: https://github.com/RNCryptor/RNCryptor/compare/5.1.0...5.2.0