use some better traits

Cargo.lock

@@ -285,6 +285,12 @@ version = "1.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ae44d1a3d5a19df61dd0c8beb138458ac2a53a7ac09eba97d55592540004306b"
 
+[[package]]
+name = "bytes"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b700ce4376041dcd0a327fd0097c41095743c4c8af8887265942faf1100bd040"
+
 [[package]]
 name = "cap-fs-ext"
 version = "0.13.7"
@@ -2819,6 +2825,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "83f0c8e7c0addab50b663055baf787d0af7f413a46e6e7fb9559a4e4db7137a5"
 dependencies = [
  "autocfg 1.0.1",
+ "bytes",
+ "memchr",
  "num_cpus",
  "pin-project-lite",
  "tokio-macros",