Add ppxlib.0.36.0 upper bound to metapp.0.4.4

Signed-off-by: Nathan Rebours <[email protected]>

Author: NathanReb

packages/metapp/metapp.0.4.4/opam

@@ -16,7 +16,7 @@ depends: [
   "dune" {>= "2.7"}
   "ocaml" {>= "4.08.0"}
   "stdcompat" {>= "12"}
-  "ppxlib" {>= "0.22.0"}
+  "ppxlib" {>= "0.22.0" & < "0.36.0"}
   "ocamlfind" {>= "1.8.1"}
   "odoc" {with-doc & >= "1.5.1"}
 ]