Updated README.md

README.md

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+__Swift concurrency support coming shortly.__
+
 Connectivity is a wrapper for Apple's [Reachability](https://developer.apple.com/library/content/samplecode/Reachability/Introduction/Intro.html) providing a reliable measure of whether Internet connectivity is available where Reachability alone can only indicate whether _an interface is available that might allow a connection_.
 
 Connectivity's objective is to solve the captive portal problem whereby an iOS device is connected to a WiFi network lacking Internet connectivity. Such situations are commonplace and may occur for example when connecting to a public WiFi network which requires the user to register before use. Connectivity can detect such situations enabling you to react accordingly.