patch 8.0.0283: mode() does not indicate Insert mode completion

Problem:    The return value of mode() does not indicate that completion is
            active in Replace and Insert mode. (Zhen-Huan (Kenny) Hu)
Solution:   Add "c" or "x" for two kinds of completion. (Yegappan Lakshmanan,
            closes #1397)  Test some more modes.

src/version.c

@@ -764,6 +764,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    283,
 /**/
     282,
 /**/