message: Add derive feature to clap dependency.
diff: @@ -9,7 +9,7 @@ anyhow = "1"
  base16 = "0.2.1"
  casper-execution-engine = { path = "../../execution_engine" }
  casper-types = { path = "../../types" }
  -clap = "3.0.0-beta.5"
  +clap = { version ="3.0.0-rc.0", features = ["derive"] }
  derive_more = "0.99.13"
  hex = { version = "0.4.2", features = ["serde"] }
  serde = "1"
  