patch 8.2.1429: Vim9: no error for missing white after : in dict

Problem:    Vim9: no error for missing white after : in dict.
Solution:   Check for white space. (closes #6671)  Also check that there is no
            white before the :.

src/version.c

@@ -754,6 +754,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1429,
 /**/
     1428,
 /**/