patch 8.0.0783: job of terminal may be freed too early

Problem:    Job of terminal may be freed too early.
Solution:   Increment job refcount. (Yasuhiro Matsumoto)

src/version.c

@@ -769,6 +769,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    783,
 /**/
     782,
 /**/