Update README.md

Author: jchasey

README.md

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 # sensor.ssh
 Generic SSH based sensor for Home Assistant
 
-[![Version](https://img.shields.io/badge/version-0.1.4-green.svg?style=for-the-badge)](#) [![mantained](https://img.shields.io/maintenance/yes/2019.svg?style=for-the-badge)](#) [![forum](https://img.shields.io/badge/forum-visit-orange.svg?style=for-the-badge)](https://community.home-assistant.io/t/unifi-security-gateway/71505)   
+[![Version](https://img.shields.io/badge/version-0.1.5-green.svg?style=for-the-badge)](#) [![mantained](https://img.shields.io/maintenance/yes/2021.svg?style=for-the-badge)](#) [![forum](https://img.shields.io/badge/forum-visit-orange.svg?style=for-the-badge)](https://community.home-assistant.io/t/unifi-security-gateway/71505)   
 
 Login to a remote server via ssh, execute a command and retrieve the result as sensor value