rand 0.8 -> 0.9

[Madoshakalaka]

rand new version 0.9 requires some special RUSTFLAG to build for wasm and renamed a bunch of functions.

[github-actions]

Size Comparison

examples	master (KB)	pull request (KB)	diff (KB)	diff (%)

✅ None of the examples has changed their size significantly.

[github-actions]

Benchmark - SSR

Yew Master

Benchmark	Round	Min (ms)	Max (ms)	Mean (ms)	Standard Deviation
Baseline	10	290.995	314.252	293.393	7.330
Hello World	10	494.448	535.904	509.431	18.115
Function Router	10	1594.612	1612.562	1601.646	5.898
Concurrent Task	10	1005.935	1007.104	1006.540	0.365
Many Providers	10	1075.936	1142.335	1100.499	24.287

Pull Request

Benchmark	Round	Min (ms)	Max (ms)	Mean (ms)	Standard Deviation
Baseline	10	310.414	312.162	310.722	0.512
Hello World	10	488.791	523.790	499.290	10.627
Function Router	10	1601.699	1626.356	1608.473	7.272
Concurrent Task	10	1005.904	1007.185	1006.680	0.401
Many Providers	10	1109.181	1138.358	1122.262	8.118

[WorldSEnder]

Makes sense. For reference, the relevant getrandom docs for the new getrandom_backend flag.

[Madoshakalaka]

To add on this, some examples like keyed_list have to stay on 0.8 for now because the dependency lipsum uses 0.8 and doesn't expose enough internals to be vendored easily.