Add Patreon link

README.md

@@ -19,6 +19,16 @@ SwiftyStoreKit is a lightweight In App Purchases framework for iOS 8.0+, tvOS 9.
 
 I started [**Sustainable Earth**](https://github.com/bizz84/Sustainable-Earth), a curated list of all things sustainable. Interested? [It's on GitHub](https://github.com/bizz84/Sustainable-Earth).
 
+### Like SwiftyStoreKit? Please consider becoming a Patron.
+
+<iframe src="https://carlo.github.io/patreon-buttons/patreon-btn.html?creator=biz84&amp;size=large"
+  allowtransparency="true"
+  frameborder="0"
+  scrolling="0"
+  width="120"
+  height="30">
+</iframe>
+
 ## Contributing
 
 #### Got issues / pull requests / want to contribute? [Read here](CONTRIBUTING.md).