updated readme

Hana Dusíková · Hana Dusíková · commit 86c40893b4d9 · 2019-07-02T10:17:16.000+02:00
diff --git a/README.md b/README.md
@@ -18,6 +18,7 @@ ctre::match<"REGEX">(subject); // C++20
 * Matching
 * Searching
 * Capturing content (named captures are supported too)
+* Back-Reference (only \g{N} syntax)
 
 The library is implementing most of the PCRE syntax with a few exceptions:
 
