Fix header level of example sections (#560)

Update MSRV badges (#559)

Remove examples section from the root README (#558)

Cut new releases dependent on `cipher` v0.5 (#553)

rc4: remove `KeySize` type parameter and `Rc4Core` type (#557)

ci: add doc, typos, and lockfile jobs (#555)

rc4: refactor tests (#556)

Move usage examples to readme (#554)

chacha20: miscellaneous cleanups (#550)

Remove unnecessary `clone`s from examples (#549)

hc-256: add `Key` and `Iv` type aliases (#547)

hc-256: tweak docs for `Hc256` and `Hc256Core` (#548)

Bump `cipher` to v0.5.1 (#546)

rc4: add basic benches (#544)

ci: bump actions/checkout from 4 to 6 in `chacha20/avx512` job (#542)