Update README.md

dan-on · web-flow · commit 41c3e3bf259c · 2020-04-01T17:14:58.000+05:00
diff --git a/README.md b/README.md
@@ -1,6 +1,11 @@
 # PHP Interval tree
 Implementation of interval binary search tree.
 
+## Installing
+```
+composer require dan-on/php-interval-tree
+```
+
 ## Usage
 
 ```php
