Release 2.2.0

[raimon49]

This release adapts to issues #66 and #67

• Implement function
• Testing
• Add a document
• Bump version
• Release to PyPI

[codecov]

Codecov Report

Merging #68 into master will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #68      +/-   ##
==========================================
+ Coverage   98.42%   98.45%   +0.02%     
==========================================
  Files           1        1              
  Lines         318      323       +5     
==========================================
+ Hits          313      318       +5     
  Misses          5        5              

Impacted Files	Coverage Δ
piplicenses.py	98.45% <100.00%> (+0.02%)	⬆️

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[raimon49]

I've shipped a new version in PyPI.
https://pypi.org/project/pip-licenses/2.2.0/