docs: Detail support for C18.

Matthew Gretton-Dann · Matthew Gretton-Dann · commit 28e9cd7e38bf · 2020-02-25T09:27:42.000Z
diff --git a/docs/language/support/versions-compilers.csv b/docs/language/support/versions-compilers.csv
@@ -1,5 +1,5 @@
 Language,Variants,Compilers,Extensions
-C/C++,"C89, C99, C11, C++98, C++03, C++11, C++14, C++17","Clang (and clang-cl [1]_) extensions (up to Clang 8.0),
+C/C++,"C89, C99, C11, C18, C++98, C++03, C++11, C++14, C++17","Clang (and clang-cl [1]_) extensions (up to Clang 8.0),
 
 GNU extensions (up to GCC 8.3), 
 
