patch 9.1.0859: several problems with the GLVS plugin

Problem:  several problems with the GLVS plugin
Solution: fix issues, add regression tests, require at least Vim 9.1
          (GuyBrush)

closes: #16036

Signed-off-by: GuyBrush <miguel.barro@live.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/version.c b/src/version.c
index bb0de39..8c2533c 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    859,
+/**/
     858,
 /**/
     857,