updated for version 7.3.049

Problem:    PLT has rebranded their Scheme to Racket.
Solution:   Add support for Racket 5.x. (Sergey Khorev)

src/version.c

@@ -714,6 +714,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    49,
 /**/
     48,
 /**/