Prepare rand v0.9.1 (#1629)

Prepare rand_core 0.9.2 (#1605)

Prepare rand_core v0.9.1 (#1591)

# Summary

Requested in #1589

Prepare 0.9.0 release (#1558)

Enable `stdarch_x86_avx512` for cpu has `avx512bw` (#1551)

Enable `stdarch_x86_avx512` for cpu has `avx512bw` (#1551)

Update: getrandom v0.3.0 rc.0 (#1541)

Update: getrandom v0.3.0 rc.0 (#1541)

Fix docs.rs build options (#1539)

Prepare 0.9.0-beta.0 (#1535)

- Update version numbers
- Update CHANGELOGs
- Add an extra benchmark