Update README.md

Author: icebob

README.md

@@ -4,6 +4,7 @@
 [![Coverage Status](https://coveralls.io/repos/github/icebob/fastest-validator/badge.svg?branch=master)](https://coveralls.io/github/icebob/fastest-validator?branch=master)
 [![Codacy Badge](https://api.codacy.com/project/badge/Grade/75256e6ec26d42f5ab1dee109ae4d3ad)](https://www.codacy.com/app/mereg-norbert/fastest-validator?utm_source=github.com&utm_medium=referral&utm_content=icebob/fastest-validator&utm_campaign=Badge_Grade)
 [![Known Vulnerabilities](https://snyk.io/test/github/icebob/fastest-validator/badge.svg)](https://snyk.io/test/github/icebob/fastest-validator)
+[![Size](https://badgen.net/bundlephobia/minzip/fastest-validator)](https://bundlephobia.com/result?p=fastest-validator)
 
 # fastest-validator [![NPM version](https://img.shields.io/npm/v/fastest-validator.svg)](https://www.npmjs.com/package/fastest-validator) [![Tweet](https://img.shields.io/twitter/url/http/shields.io.svg?style=social)](https://twitter.com/intent/tweet?text=The%20fastest%20JS%20validator%20library%20for%20NodeJS&url=https://github.com/icebob/fastest-validator&via=Icebobcsi&hashtags=nodejs,javascript)
 :zap: The fastest JS validator library for NodeJS.