Cleaning up after bumping Rust MSRV

[wks]

We start using the MSRV-aware resolver (resolver = "3").

We bumped dependency versions.

• We removed locked dependency versions that work around broken transitive dependencies due to MSRV limitation.
• We still limit some of our dependency versions (sysinfo and criterion) below the latest version because their latest versions require higher MSRV and newer Rust editions.
  • Note that the MSRV-aware resolver can find a compatible version only within the allowed version range. For example, if we specify 0.7.2, it will be equivalent to >=0.7.2,<0.8.0. So if 0.7.4 is compatible but 0.7.5 is not, it will resolve to 0.7.4. But if 0.7.2 is incompatible, the resolver will refuse to go below 0.7.2, and the resolution will fail. Both sysinfo and criterion broke MSRV compatibility when bumping a minor version (since the major versions are 0, minor version signifies incompatibility), so the MSRV-aware resolver is not helping for those two specific dependencies.

Removed a workaround in ByteMapStateStorage::new where we could use const {} to initialize a vector without copying.

[wks]

The API check reported a removed implementation of ParallelBridge in the "rayon" crate. It was likely auto-generated by the "rayon" dependency transitively pulled in from the "sysinfo" crate. The "sysinfo" crate used to depend on "rayon" but no longer now. We never intended to expose this implementation to the user.

[qinsoon]

LGTM