Update readme

README.md

@@ -72,14 +72,13 @@ Tested on:
   * g++ 8.0.1  
   * g++ 7.3  
   * g++ 6.4
+  * g++ 5.5  
   * g++ 4.9
   * g++ 4.8
 - Windows
   * MSVC 2015
   * MSVC 2017
 
-Unfortunately GCC5.5 has a compiler bug which I have not worked around yet. All other GCC5 versions should work.
-
 ### Dependencies
 
 Requires [Standardese](https://github.com/foonathan/standardese) for generating documentation.