add deps status

README.md

@@ -4,6 +4,7 @@ imageproc
 [![crates.io](https://img.shields.io/crates/v/imageproc.svg)](https://crates.io/crates/imageproc)
 [![doc-badge]][doc-link]
 [![License](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/image-rs/imageproc/blob/master/LICENSE)
+[![Dependency status](https://deps.rs/repo/github/image-rs/imageproc/status.svg)](https://deps.rs/repo/github/image-rs/imageproc)
 
 An image processing library, based on the [image](https://github.com/image-rs/image) library. There may initially
 be overlap between the functions in this library and those in `image::imageops`.