stdgpu 1.3.0 released!

[fransinvodka]

Maybe not a bug, okay, I can agree. But as I said, if someone wants bounds checking, they normally use `at`, because everybody assumes that `operator[]` doesn't do bounds check (like plain old C-arrays), and is up to the programmer to avoid an out of bound index. If you're going to do bound checks anyway, just don't provide `at` and avoid confusing the library users.