update dependencies; minor fixes in README

[rafamizes]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.53%. Comparing base (2fdbbfd) to head (b1fa9e9).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #176   +/-   ##
=======================================
  Coverage   99.52%   99.53%           
=======================================
  Files          11       11           
  Lines         210      213    +3     
=======================================
+ Hits          209      212    +3     
  Misses          1        1           

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