patch 9.0.0850: MS-Windows Terminal has unstable color control

Problem:    MS-Windows Terminal has unstable color control.
Solution:   Do not try to read the old command prompt colortable, use modern
            VT sequences. (Christopher Plewright, closes #11450,
            closes #11373)
diff --git a/src/version.c b/src/version.c
index 6884514..3433ebc 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    850,
+/**/
     849,
 /**/
     848,