Fix typo in readme

Author: lukechilds

README.md

@@ -11,7 +11,7 @@
 
 - **Microscopic:** weighs less than 200 bytes gzipped
 - **Useful:** a wildcard `"*"` event type listens to all events
-- **Famliar:** same names & ideas as [Node's EventEmitter](https://nodejs.org/api/events.html#events_class_eventemitter)
+- **Familiar:** same names & ideas as [Node's EventEmitter](https://nodejs.org/api/events.html#events_class_eventemitter)
 - **Functional:** methods don't rely on `this`
 - **Great Name:** somehow [mitt](https://npm.im/mitt) wasn't taken