Update packages/gen_js_api/gen_js_api.1.0.7/opam

Author: mseri

packages/gen_js_api/gen_js_api.1.0.7/opam

@@ -20,7 +20,7 @@ bug-reports: "https://github.com/LexiFi/gen_js_api/issues"
 depends: [
   "dune" {>= "2.0"}
   "ocaml" {>= "4.08" & < "5.3.0"}
-  "ppxlib" {>= "0.9"}
+  "ppxlib" {>= "0.18"}
   "ocaml-migrate-parsetree" {>= "1.6.0" & < "2.0.0"}
   "js_of_ocaml-compiler" {with-test}
   "conf-npm" {with-test}