message: ignore difference warning
diff: @@ -6,6 +6,7 @@ yanked = "deny"
  ignore = [
  "RUSTSEC-2019-0031", # ring currently uses 'spin' for feature detection
  "RUSTSEC-2020-0016", # mio 0.6 uses 'net2' (removed in 0.7) but tokio is still pinned to 0.6
  + "RUSTSEC-2020-0095", # insta (a dev dependency) uses `difference`
  ]
  [bans]
  