bump bevy_tasks futures-lite to 2.0.1

[tbillington]

Objective

Updates futures-lite in bevy_tasks to the next major version (1 -> 2).

Also removes the duplication of futures-lite, as async-fs requires v 2, so there are currently 2 copies of futures-lite in the dependency tree.

Futures-lite has received a number of updates since bevy's current version 1.4.

[hymm]

looking at cargo tree there are still other versions of futures-lite < 2 in tree. One in bevy_assets and one in dev-dependencies. I also think we'd need to upgrade async-fs to v2 to remove futures lite 1. We should at least do the explicit dependencies in bevy_assets and the root Cargo.toml in this pr.

edit: async-fs will be updated in this pr #10370

[tbillington]

Good catch @hymm , I think I accidentally ran cargo tree in my project repo instead of bevy so I missed those.

I will re-investigate after #10370 is merged :)

[alice-i-cecile]

Merging the linked PR for you now :)

[tbillington]

I've updated all usages of futures-lite and async-executor which was using v1. Running cargo tree now only gives me futures-lite 2.0.1.

[alice-i-cecile]

@tbillington I resolved the formatting issue for you :)