message: Added derive feature to serde crate
diff: @@ -25,7 +25,7 @@ snap = "1"
  atomicwrites = {version="0.2.2", optional=true}
  tempfile = "3.0"
  log = "0.4"
  -serde = "1.0"
  +serde = {version="1.0", features=["derive"]}
  serde_json = "1.0"
  num_cpus = "1.2"
  fs2={version="0.4", optional=true}
  