Update other_libs.md

docs/other_libs.md

@@ -17,6 +17,7 @@ free to tell me about their quality.) _Newest additions are in italics._
 - **strings** [utf8](https://github.com/sheredom/utf8.h): utf8 string library (public domain)
 - **misc** [MakeID.h](http://www.humus.name/3D/MakeID.h): allocate/deallocate small integer IDs efficiently (public domain)
 - **misc** [gb_string.h](https://github.com/gingerBill/gb): dynamic strings for C (public domain)
+- _**misc** [loguru](https://github.com/emilk/loguru): flexible logging for C++ (public domain)
 - _**hardware** [EasyTab](https://github.com/ApoorvaJ/EasyTab): multi-platform tablet input (public domain)_
 
 Not public domain: