Update README.md

Author: nthndnn

README.md

@@ -1 +1,11 @@
-# Laravel Currency Casts
+# Laravel Currency Casts 💵
+
+Laravel Currency Casts allows conversion of a `Money` instance (from the [brick/money](https://github.com/brick/money) library) into a JSON-encoded string to be stored in a JSON field.
+
+## Installation
+
+You can install the package via [Composer](https://getcomposer.org/):
+
+```bash
+composer require nathandunn/laravel-currency-casts
+```