Add license scan report and status

[fossabot]

Your FOSSA integration was successful! Attached in this PR is a badge and license report to track scan status in your README.

Below are docs for integrating FOSSA license checks into your CI:

• CircleCI
• TravisCI
• Jenkins
• Other

[fossabot]

Your license scan is passing -- congrats!

Your badge status is now updated and ready to merge:

[codecov[bot]]

Codecov Report

Merging #4 into master will not change coverage. The diff coverage is n/a.

@@            Coverage Diff            @@
##             master       #4   +/-   ##
=========================================
  Coverage     79.36%   79.36%           
  Complexity       41       41           
=========================================
  Files             1        1           
  Lines            63       63           
  Branches         34       34           
=========================================
  Hits             50       50           
  Misses            5        5           
  Partials          8        8

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