Work around MSVC error C2580

[zcbenz]

Refs #1513.

It seems to be a bug of MSVC that it can not distinguish between:

  array& operator=(array&& other) && = delete;
  array& operator=(array&& other) & = default;

and gives error:

C:\cygwin\home\zcbenz\codes\mlx\mlx/array.h(70,10): error C2580: 'mlx::core::array
 &mlx::core::array::operator =(mlx::core::array &&) &': multiple versions of a def
aulted special member functions are not allowed [C:\cygwin\home\zcbenz\codes\mlx\b
uild\mlx.vcxproj]

[awni]

It looks like it was fixed alreaady? https://developercommunity.visualstudio.com/t/error-c2580-multiple-versions-of-a-defaulted-speci/468431

Is it reasonable to use a newer version of MSVC? The fix looks like from 4+ years ago..

[zcbenz]

Updated my Visual Studio and it is gone 👍

The bug was 4 years ago but the fix only got released a few months ago, we are quite lucky this time.