add new feature description of 6.5.0 into README.md

diff --git a/README.md b/README.md
index d386987794c0114ced0bcb89be678da351074c01..d0b43b9ae43eec8be2e2c14d19fd15791e3743b7 100644 (file)
--- a/README.md
+++ b/README.md
@@ -26,6 +26,18 @@ Supported character encodings:
 * CP1251:  contributed by Byte
 
 
+New feature of version 6.5.0
+--------------------------
+
+* NEW: \K (keep)
+* NEW: \R (general newline) \N (no newline)
+* NEW: \O (true anychar)
+* NEW: if-then-else syntax   (?(...)...\|...)
+* NEW: backreference validity checker  (*original)
+* NEW: absent group   (?~...)
+* NEW: absent group with custom generator  (*original)
+
+
 New feature of version 6.4.0
 --------------------------