Merge pull request #14 from dns13/patch-1

Add emio as printf library

README.md

@@ -397,6 +397,7 @@ Computer Vision
 * [mini-printf](https://github.com/ldoolitt/mini-printf) - Minimal printf() implementation for embedded projects.
 * [nanoprintf](https://github.com/charlesnicholson/nanoprintf) - The smallest public printf implementation for its feature set.
 * [fmt](https://github.com/fmtlib/fmt) - Modern formatting library providing a fast and safe alternative to C stdio and C++ iostreams.
+* [emio](https://github.com/Viatorus/emio) - Very small binary footprint std::format like formatting using C++20.
 
 ### scanf