message: Updating toolchain check test.
diff: @@ -20,7 +20,7 @@ const APP_NAME: &str = "cargo-casper";
  const ABOUT: &str =
  "A command line tool for creating a Wasm contract and tests at <path> for use on the \
  Casper Platform.";
  -const TOOLCHAIN: &str = "nightly-2020-11-10";
  +const TOOLCHAIN: &str = "nightly-2020-12-16";
  const ROOT_PATH_ARG_NAME: &str = "path";
  const ROOT_PATH_ARG_VALUE_NAME: &str = "path";
  