patch 8.2.1988: still in Insert mode when opening terminal popup

Problem:    Still in Insert mode when opening terminal popup with a <Cmd>
            mapping in Insert mode.
Solution:   Exit Insert mode. (closes #7295)

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1988,
 /**/
     1987,
 /**/