Update readme

Author: WhereJuly

readme.md

@@ -16,7 +16,7 @@ A tiny runtime type-safe _polymorphic noop object_ that substitutes for your rea
 
 ![npm bundle size](https://img.shields.io/bundlephobia/min/@wherejuly/null-object)
 ![npm bundle size](https://img.shields.io/bundlephobia/minzip/@wherejuly/null-object)
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 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg?color=green)](https://opensource.org/licenses/MIT)
 
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