patch 8.1.2220: :cfile does not abort like other quickfix commands

Problem:    :cfile does not abort like other quickfix commands.
Solution:   Abort when desired. Add tests for aborting. (Yegappan Lakshmanan,
            closes #5121)
diff --git a/src/version.c b/src/version.c
index 345fc7a..e348c32 100644
--- a/src/version.c
+++ b/src/version.c
@@ -742,6 +742,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2220,
+/**/
     2219,
 /**/
     2218,