Update packages/cohttp-async/cohttp-async.6.1.1/opam

Author: mseri

packages/cohttp-async/cohttp-async.6.1.1/opam

@@ -27,7 +27,7 @@ depends: [
   "ocaml" {>= "4.14" & < "5.3.0"}
   "http" {= version}
   "cohttp" {= version}
-  "async_kernel" {>= "v0.16.0"}
+  "async_kernel" {>= "v0.17.0"}
   "async_unix" {>= "v0.16.0"}
   "async" {>= "v0.16.0"}
   "base" {>= "v0.16.0"}