bytesrw.0.3.0: rule out alpine and constrain topkg >= 1.1.1

Author: dbuenzli

packages/bytesrw/bytesrw.0.3.0/opam

@@ -56,8 +56,9 @@ depends: [
   "ocaml" {>= "4.14.0"}
   "ocamlfind" {build}
   "ocamlbuild" {build}
-  "topkg" {build & >= "1.1.0"}
+  "topkg" {build & >= "1.1.1"}
 ]
+available: [ os-distribution != "alpine" ]
 depopts: [
   "conf-mbedtls"
   "conf-xxhash"