0.2.8

• Support specifying visibility directly on impl.

  #[ext(Ext)]
  pub impl Type {
      fn method(&self) {}
  }

  pub impl Type {
  ^^^
  

  The old impl-level visibility syntax (#[ext(pub)]) will still be supported, but it is deprecated and will be removed in the next major version.

  Migration:

  - #[ext(pub)]
  - impl Type {
  + #[ext]
  + pub impl Type {
      fn method(&self) {}
  }

• Improve compile time by removing all dependencies.

• Support type parameter defaults.