message: Rename CommonArgs -> AppExt
diff: @@ -11,7 +11,7 @@ pub use clap::Arg;
  pub type App = clap::App<'static, 'static>;
  -pub trait CommonArgs: Sized {
  +pub trait AppExt: Sized {
  fn _arg(self, arg: Arg<'static, 'static>) -> Self;
  fn arg_package(self, package: &'static str, all: &'static str, exclude: &'static str) -> Self {
  @@ -150,7 +150,7 @@ a global configuration.")
  }
  }
  -impl CommonArgs for App {
  +impl AppExt for App {
  fn _arg(self, arg: Arg<'static, 'static>) -> Self {
  self.arg(arg)
  }
  