Bump chacha20 and salsa20

[trevyn]

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

[codecov-commenter]

Codecov Report

Merging #402 (976c102) into master (6105d7a) will decrease coverage by 0.05%.
The diff coverage is 71.42%.

@@            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     

Impacted Files	Coverage Δ
chacha20poly1305/src/lib.rs	76.92% <ø> (ø)
eax/src/online.rs	0.00% <0.00%> (ø)
aes-gcm-siv/src/lib.rs	87.14% <100.00%> (ø)
aes-gcm/src/lib.rs	94.23% <100.00%> (ø)
ccm/src/lib.rs	99.14% <100.00%> (ø)
deoxys/src/modes.rs	88.82% <100.00%> (-0.56%)	⬇️
xsalsa20poly1305/src/lib.rs	85.10% <100.00%> (ø)

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