patch 8.0.0921: terminal window cursor shape not supported in the GUI

Problem:    Terminal window cursor shape not supported in the GUI.
Solution:   Use the terminal window cursor shape in the GUI.
diff --git a/src/version.c b/src/version.c
index 3758ab9..72cd083 100644
--- a/src/version.c
+++ b/src/version.c
@@ -770,6 +770,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    921,
+/**/
     920,
 /**/
     919,