patch 8.1.1125: libvterm does not handle the window position report

Problem:    Libvterm does not handle the window position report.
Solution:   Let libvterm call the fallback CSI handler when not handling CSI
            sequence.  Handle the window position report in Vim.

src/version.c

@@ -771,6 +771,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1125,
 /**/
     1124,
 /**/