Update dependencies

[nolze]

Resolves #12

[codecov-io]

Codecov Report

Merging #13 into master will increase coverage by 0.04%.
The diff coverage is 50%.

@@            Coverage Diff             @@
##           master      #13      +/-   ##
==========================================
+ Coverage   33.99%   34.03%   +0.04%     
==========================================
  Files          12       12              
  Lines         753      755       +2     
==========================================
+ Hits          256      257       +1     
- Misses        497      498       +1

Impacted Files	Coverage Δ
msoffcrypto/format/doc97.py	31.96% <ø> (ø)	⬆️
msoffcrypto/__main__.py	0% <ø> (ø)	⬆️
msoffcrypto/format/base.py	63.63% <50%> (-3.04%)	⬇️

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