Add cppstat (#1708)

Author: cdervis

README.md

@@ -1520,6 +1520,7 @@ A curated list of awesome C++ (or C) frameworks, libraries, resources, and shiny
 * [Quick Bench](https://quick-bench.com/) - Quick C++ Benchmarks.
 * [CppCon](http://cppcon.org/) - The C++ Conference.
 * [C++ reference](https://cppreference.com) - A complete online reference for the C and C++ languages and standard libraries.
+* [cppstat](https://cppstat.dev) - A site that lists C++ features and their support by compilers and standard library implementations in an accessible way.
 * [C++ by Example](http://www.cbyexample.com/) - Learn C++ by Example.
 * [cplusplus.com](http://www.cplusplus.com/) - The C++ Resources Network.
 * [C FAQ](http://c-faq.com/) - C frequently asked questions.