Add composer.json

README.md

 # ETH Simple Shortlinks #
 **Contributors:** [ethitter](https://profiles.wordpress.org/ethitter/)  
 **Donate link:** https://ethitter.com/donate/  
-**Tags:** seo, meta tags  
+**Tags:** shortlink, shortlinks  
 **Requires at least:** 4.4  
 **Tested up to:** 6.0  
 **Stable tag:** 0.6.1  
+**Requires PHP:** 7.2  
 **License:** GPLv2 or later  
 **License URI:** http://www.gnu.org/licenses/gpl-2.0.html