docs: updated README

Author: voidberg

README.md

@@ -2,7 +2,6 @@
 [![Build states](https://github.com/voidberg/imagecache-sharp/workflows/Node.js%20CI/badge.svg)](https://github.com/voidberg/imagecache-sharp/actions?query=workflow%3A%22Node.js+CI%22+branch%3Amaster++)
 [![Semantic release](https://img.shields.io/badge/semantic--release-angular-e10079?logo=semantic-release)](https://github.com/semantic-release/semantic-release/)
 [![Commitizen friendly](https://img.shields.io/badge/commitizen-friendly-brightgreen.svg)](http://commitizen.github.io/cz-cli/)
-[![semantic-release](https://img.shields.io/badge/%20%20%F0%9F%93%A6%F0%9F%9A%80-semantic--release-e10079.svg)](https://github.com/semantic-release/semantic-release)
 [![Apache 2.0 License](https://img.shields.io/npm/l/imagecache-sharp.svg)](https://opensource.org/licenses/Apache-2.0)
 
 ## What is it?
@@ -194,6 +193,7 @@ Configuration:
 
 - `width`: The width of the new image. Can be a number or a percent value.
 - `height`: The height of the new image. Can be a number or a percent value.
+- `upscale`: Whether to upscale the image. Defaults to true.
 
 ### Scale and crop