patch 8.1.0030: stoping Vim running in a terminal may not work

Problem:    Stoping Vim running in a terminal may not work.
Solution:   Instead of sending <Esc> send CTRL-O.
diff --git a/src/version.c b/src/version.c
index 70fd603..d13bcfd 100644
--- a/src/version.c
+++ b/src/version.c
@@ -762,6 +762,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    30,
+/**/
     29,
 /**/
     28,