Fix lower bound for slipshow.0.6.0

Author: panglesd

packages/slipshow/slipshow.0.6.0/opam

@@ -24,7 +24,7 @@ depends: [
   "fmt"
   "logs"
   "fsevents-lwt"
-  "js_of_ocaml-compiler"
+  "js_of_ocaml-compiler" {>= "6.0.1"}
   "js_of_ocaml-lwt"
   "magic-mime"
   "dream" {>= "1.0.0~alpha5"}