patch 8.0.0051
Problem:    New code for job_stop() breaks channel test on AppVeyor.
Solution:   Revert the change.
diff --git a/src/version.c b/src/version.c
index 8386381..a6f915a 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    51,
+/**/
     50,
 /**/
     49,