[BUG] No associated item named LANES found for struct Simd

[ashayp22]

Describe the bug
simd-rand isn't able to recognize Portable SIMD when accessing the constant LANES.

This issue pops up here:

simd-rand/src/portable/xoshiro256plusplusx4.rs

Line 69 in eb1d97a

const LEN: usize = u64x4::LANES;

simd-rand/src/portable/xoshiro256plusplusx8.rs

Line 69 in eb1d97a

const LEN: usize = u64x8::LANES;

simd-rand/src/portable/xoshiro256plusx4.rs

Line 69 in eb1d97a

const LEN: usize = u64x4::LANES;

simd-rand/src/portable/xoshiro256plusx8.rs

Line 69 in eb1d97a

const LEN: usize = u64x8::LANES;

Environment
Rust nightly 1.77, Mac M1

Additional context
A temporary fix is hardcoding the LANE number in these spots.

[martinothamar]

Hey! Seems like it was renamed to LEN, I've pushed a commit with the fix. Thanks :)