patch 9.0.0955: libvterm does not support the XTQMODKEYS request

Problem:    Libvterm does not support the XTQMODKEYS request.
Solution:   Implement the XTQMODKEYS request and response.  Update the keycode
            check results.
diff --git a/src/version.c b/src/version.c
index 447392c..33f736a 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    955,
+/**/
     954,
 /**/
     953,