Update README.md

Author: gignupg

README.md

@@ -2,6 +2,7 @@
 ![npm](https://img.shields.io/npm/dw/detect-file-encoding-and-language)
 ![npm](https://img.shields.io/npm/v/detect-file-encoding-and-language)
 ![Libraries.io dependency status for latest release](https://img.shields.io/librariesio/release/npm/detect-file-encoding-and-language)
+![npm bundle size](https://img.shields.io/bundlephobia/min/detect-file-encoding-and-language)
 
 [![NPM stats](https://nodei.co/npm/detect-file-encoding-and-language.svg?downloadRank=true&downloads=true)](https://www.npmjs.org/package/detect-file-encoding-and-language)