chore: Update cargo-deny config

[tottoto]

Motivation

Updates to reflect the current latest state and cargo-deny behavior.

Solution

• Allow dirs and dirs-sys crates.
  • prost-build depends on dirs (and dirs-sys depended by dirs) because its dependency which 4.4.1 become to depend on dirs.
  • Recently these crates seem not to have a lot of dependencies.
    • https://crates.io/crates/dirs/5.0.1/dependencies
    • https://crates.io/crates/dirs-sys/0.4.1/dependencies
• Adds redox_syscall to cargo-deny skip-tree.
  • dirs-sys depends on an old version of redox_syscall.
• Removes base64 from cargo-deny skip-tree
  • As headers 0.3.9 updated to base64 0.21, the duplicate version of base64 is resolved.

[tottoto]

which 4.4.2 changed to use home instead of dirs.

https://github.com/harryfei/which-rs/blob/4.4.2/CHANGELOG.md

[tottoto]

socket2 in hyper 0.14 has been resolved at hyper 0.14.28.

https://github.com/hyperium/hyper/releases/tag/v0.14.28

[LucioFranco]

Thanks!