add msgpack support

Cargo.lock

@@ -1193,9 +1193,9 @@ dependencies = [
 
 [[package]]
 name = "http"
-version = "0.2.3"
+version = "0.2.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7245cd7449cc792608c3c8a9eaf69bd4eabbabf802713748fd739c98b82f0747"
+checksum = "527e8c9ac747e28542699a951517aa9a6945af506cd1f2e1b53a576c17b6cc11"
 dependencies = [
  "bytes 1.0.1",
  "fnv",
@@ -2728,12 +2728,14 @@ dependencies = [
  "rauth",
  "regex",
  "reqwest 0.11.4",
+ "rmp-serde",
  "rocket",
  "rocket-governor",
  "rocket_cors",
  "serde",
  "serde_json",
  "ulid",
+ "url",
  "validator",
  "web-push",
 ]
@@ -2753,6 +2755,27 @@ dependencies = [
  "winapi 0.3.9",
 ]
 
+[[package]]
+name = "rmp"
+version = "0.8.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4f55e5fa1446c4d5dd1f5daeed2a4fe193071771a2636274d0d7a3b082aa7ad6"
+dependencies = [
+ "byteorder",
+ "num-traits",
+]
+
+[[package]]
+name = "rmp-serde"
+version = "0.15.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "723ecff9ad04f4ad92fe1c8ca6c20d2196d9286e9c60727c4cb5511629260e9d"
+dependencies = [
+ "byteorder",
+ "rmp",
+ "serde",
+]
+
 [[package]]
 name = "rocket"
 version = "0.5.0-rc.1"
@@ -3831,9 +3854,9 @@ checksum = "a156c684c91ea7d62626509bce3cb4e1d9ed5c4d978f7b4352658f96a4c26b4a"
 
 [[package]]
 name = "url"
-version = "2.2.0"
+version = "2.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5909f2b0817350449ed73e8bcd81c8c3c8d9a7a5d8acba4b27db277f1868976e"
+checksum = "a507c383b2d33b5fc35d1861e77e6b383d158b2da5e14fe51b83dfedf6fd578c"
 dependencies = [
  "form_urlencoded",
  "idna",