update installation steps

Author: ammarahm-ed

docs/pages/installation.mdx

@@ -1,13 +1,13 @@
 # Installation
 
-Install the ActionSheet with `yarn` or `npm`.
+Install the ActionSheet with `yarn` or `npm`. You will also need to install `react-native-gesture-handlers` if you haven't already.
 
 ```fish
-npm install react-native-actions-sheet --save
+npm install react-native-actions-sheet react-native-gesture-handlers --save
 ```
 
 or
 
 ```fish
-yarn add react-native-actions-sheet
+yarn add react-native-actions-sheet react-native-gesture-handlers 
 ```