letsencrypt-mirage: restrict to earlier http-mirage-client versions

Author: hannesm

packages/letsencrypt-mirage/letsencrypt-mirage.1.0.0/opam

@@ -12,7 +12,7 @@ depends: [
   "ocaml" {>= "4.13.0"}
   "dune" {>= "1.2.0"}
   "letsencrypt" {= version}
-  "http-mirage-client"
+  "http-mirage-client" {< "0.0.9"}
   "tcpip" {>= "7.0.0"}
   "mirage-time" {>= "3.0.0"}
   "duration"