patch 8.2.2872: Python tests fail without the channel feature

Problem:    Python tests fail without the channel feature.
Solution:   Add a feature check. (Dominique Pellé, closes #8226)
diff --git a/src/version.c b/src/version.c
index 8d73f68..af40462 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2872,
+/**/
     2871,
 /**/
     2870,