patch 7.4.2019
Problem:    When ignoring case utf_fold() may consume a lot of time.
Solution:   Optimize for ASCII.
diff --git a/src/version.c b/src/version.c
index 7317edf..8013b45 100644
--- a/src/version.c
+++ b/src/version.c
@@ -759,6 +759,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2019,
+/**/
     2018,
 /**/
     2017,