chore: add badge for sharp js library

Author: LabEG

README.md

@@ -1,6 +1,7 @@
 # Microservice for responsive resize, compression and optimization of images on the fly for web pages
 
 [![Codacy Badge](https://app.codacy.com/project/badge/Grade/042786e7f0304d1ea29d83f8c1522a55)](https://www.codacy.com/gh/MobileTeleSystems/image-optimize/dashboard?utm_source=github.com&utm_medium=referral&utm_content=MobileTeleSystems/image-optimize&utm_campaign=Badge_Grade)
+![npm](https://img.shields.io/npm/v/sharp?label=sharp)
 [![Contributor Covenant](https://img.shields.io/badge/Contributor%20Covenant-2.1-4baaaa.svg)](CODE_OF_CONDUCT.md)
 [![GitHub license](https://img.shields.io/badge/license-MIT-green.svg)](https://github.com/MobileTeleSystems/image-optimize/blob/main/LICENSE)