message: set minimum patch version for atty
diff: @@ -24,7 +24,7 @@ serde = "1.0"
  serde_json = "1.0"
  serde_derive = "1.0"
  serde_cbor = "0.11"
  -atty = "0.2"
  +atty = "~0.2.6"
  clap = { version = "2.33", default-features = false }
  csv = "1.1"
  walkdir = "2.3"
  