patch 8.0.1596: no autocommand specifically for opening a terminal window

Problem:    No autocommand specifically for opening a terminal window.
Solution:   Add TerminalOpen. (?, closes #2484)
diff --git a/src/version.c b/src/version.c
index 4f1c001..a6ca132 100644
--- a/src/version.c
+++ b/src/version.c
@@ -767,6 +767,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1596,
+/**/
     1595,
 /**/
     1594,