Add lower bound on lwt 5.7

Author: shonfeder

packages/cohttp-lwt-jsoo/cohttp-lwt-jsoo.6.1.0/opam

@@ -28,7 +28,7 @@ depends: [
   "cohttp" {= version}
   "cohttp-lwt" {= version}
   "logs"
-  "lwt" {>= "3.0.0"}
+  "lwt" {>= "5.7.0"}
   "lwt_ppx" {with-test}
   "conf-npm" {with-test}
   "js_of_ocaml" {>= "3.3.0"}

packages/cohttp-lwt/cohttp-lwt.6.1.0/opam

@@ -28,7 +28,7 @@ depends: [
   "ocaml" {>= "4.08"}
   "http" {= version}
   "cohttp" {= version}
-  "lwt" {>= "5.4.0"}
+  "lwt" {>= "5.7.0"}
   "sexplib0"
   "ipaddr" {>= "5.6.0"}
   "ppx_sexp_conv" {>= "v0.13.0"}