patch 9.0.2031: TextChangedI may be triggered by non-insert mode change

Problem:  `TextChangedI` can trigger on entering Insert mode if there
          was previously a change not in Insert mode.
Solution: Make it trigger only when text is actually changed in Insert
          mode.

closes: #13265
closes: #13338

Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: Evgeni Chasnovski <evgeni.chasnovski@gmail.com>
diff --git a/src/version.c b/src/version.c
index b90f76f..4bac984 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2031,
+/**/
     2030,
 /**/
     2029,