message: feat(api) Remove the `WasmExternTypeInner` trait.
  I believe this trait is no longer necessary since `WasmExternType` has
  been moved inside the `wasmer` crate itself (this crate).
  See
  `cargo check` and `cargo test` agrees.
  Also, this trait is annoying to implement abstraction over
  `NativeFunc` since it is not re-exported outside of the crate.
diff: @@ -92,32 +92,12 @@ where
  }
  }
  -/// Marker trait to make Rust happy: required to allow `NativeFunc<i32>` work.
  -/// without this trait, the singleton case looks like a generic impl in the macro
  -/// expansion and Rust will not compile this code because it's a potential duplicate
  -/// with all the existing tuples for which this is also being implemented.
  -pub unsafe trait WasmExternTypeInner: Copy + WasmExternType
  -where
  - Self: Sized,
  -{
  -}
  -unsafe impl WasmExternTypeInner for i8 {}
  -unsafe impl WasmExternTypeInner for u8 {}
  -unsafe impl WasmExternTypeInner for i16 {}
  -unsafe impl WasmExternTypeInner for u16 {}
  -unsafe impl WasmExternTypeInner for i32 {}
  -unsafe impl WasmExternTypeInner for u32 {}
  -unsafe impl WasmExternTypeInner for i64 {}
  -unsafe impl WasmExternTypeInner for u64 {}
  -unsafe impl WasmExternTypeInner for f32 {}
  -unsafe impl WasmExternTypeInner for f64 {}
  -
  macro_rules! impl_native_traits {
  ( $( $x:ident ),* ) => {
  #[allow(unused_parens, non_snake_case)]
  impl<'a $( , $x )*, Rets> NativeFunc<'a, ( $( $x ),* ), Rets>
  where
  - $( $x: WasmExternType + WasmExternTypeInner, )*
  + $( $x: WasmExternType, )*
  Rets: WasmTypeList,
  {
  /// Call the typed func and return results.
  