v8.0.0

Major Changes

• #484 09faf35 Thanks @braxtonhall! - Allow orElse method to change ok types.
  This makes the orElse types match the implementation.

  This is a breaking change for the orElse type argument list,
  as the ok type must now be provided before the err type.

  - result.orElse<ErrType>(foo)
  + result.orElse<OkType, ErrType>(foo)

  This only applies if type arguments were
  explicitly provided at an orElse callsite.
  If the type arguments were inferred,
  no updates are needed during the upgrade.