Update README.md (nathanchapman#12)

nathanchapman · web-flow · commit d898a2f8456c · 2019-10-26T11:39:38.000-05:00
diff --git a/README.md b/README.md
@@ -636,3 +636,7 @@ process.nextTick(() => {
 ```javascript
 'use strict';
 ```
+
+## Sponsorship 🎗
+
+If you found this project useful, please consider becoming a [sponsor on GitHub](https://github.com/sponsors/nathanchapman).
