patch 8.2.1263: Vim9: comperators use 'ignorecase' in Vim9 script

Problem:    Vim9: comperators use 'ignorecase' in Vim9 script.
Solution:   Ignore 'ignorecase'.  Use true and false instead of 1 and 0.
            (closes #6497)

src/version.c

@@ -754,6 +754,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1263,
 /**/
     1262,
 /**/