patch 8.0.0301: not enough testing for setting options

Problem:    No tests for ":set completion" and various errors of the :set
            command.
Solution:   Add more :set tests. (Dominique Pelle, closes #1440)
diff --git a/src/version.c b/src/version.c
index da53eb3..ffb7c6c 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    301,
+/**/
     300,
 /**/
     299,