Bump chacha20 and salsa20

[trevyn]

xref #400 (comment)
xref RustCrypto/utils#723

[codecov-commenter]

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Codecov Report

❌ Patch coverage is 71.42857% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 87.95%. Comparing base (6105d7a) to head (976c102).
⚠️ Report is 194 commits behind head on master.

Files with missing lines	Patch %	Lines
eax/src/online.rs	0.00%	4 Missing ⚠️
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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #402      +/-   ##
==========================================
- Coverage   88.00%   87.95%   -0.06%     
==========================================
  Files          40       40              
  Lines        1959     1959              
==========================================
- Hits         1724     1723       -1     
- Misses        235      236       +1     

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