Update dependencies and security margin

[mikelodder7]

This updates the dependencies to secure versions since crypto_box 0.6 has a vulnerability.
This also updates from using Chacha12 to Chacha20 which has higher security margins and performance difference is negligible.

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: -0.78% ⚠️

Comparison is base (57fe97c) 81.81% compared to head (edf11c1) 81.03%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #115      +/-   ##
==========================================
- Coverage   81.81%   81.03%   -0.78%     
==========================================
  Files          43       44       +1     
  Lines        2540     2573      +33     
==========================================
+ Hits         2078     2085       +7     
- Misses        462      488      +26     

Files Changed	Coverage Δ
...crypt-core/src/encrypt/plain_message_shared_key.rs	87.87% <ø> (ø)
...crypt-core/src/encrypt/plain_message_public_key.rs	97.72% <100.00%> (-0.06%)	⬇️
...ncrypt/plain_message_shared_key/shared_key_core.rs	100.00% <100.00%> (ø)
serde-encrypt-core/src/random.rs	100.00% <100.00%> (ø)
serde-encrypt-core/tests/test_util/random/mod.rs	80.00% <100.00%> (ø)
serde-encrypt/src/random.rs	90.00% <100.00%> (ø)
serde-encrypt/src/shared_key.rs	91.17% <100.00%> (+0.55%)	⬆️

... and 2 files with indirect coverage changes

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[utkarshgupta137]

@laysakura ping

[jonasg-adv]

@laysakura ping