patch 8.1.0225: mode() does not indicate using CTRL-O from Insert mode

Problem:    Mode() does not indicate using CTRL-O from Insert mode.
Solution:   Add "niI", "niR" and "niV" to mode() result. (closes #3000)
diff --git a/src/version.c b/src/version.c
index ab58a5c..1aa6448 100644
--- a/src/version.c
+++ b/src/version.c
@@ -799,6 +799,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    225,
+/**/
     224,
 /**/
     223,