patch 9.0.1113: users cannot easily try out a PR

Problem:    Users cannot easily try out a PR.
Solution:   Add an "artifacts" section to the AppVeyor CI config. (Christian
            Brabandt, closes #11762)
diff --git a/src/version.c b/src/version.c
index 4286a67..d4abf68 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1113,
+/**/
     1112,
 /**/
     1111,