Add a MIT license badge

[mwouts]

No description provided.

[github-actions]

Thank you for making this pull request.

Did you know? You can try it on Binder: .

Also, the version of ITables developed in this PR can be installed with pip:

pip install git+https://github.com/mwouts/itables.git@mit_badge

(this requires nodejs, see more at Developing ITables)

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.76%. Comparing base (038f597) to head (2e32555).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #342   +/-   ##
=======================================
  Coverage   94.76%   94.76%           
=======================================
  Files          24       24           
  Lines        1280     1280           
=======================================
  Hits         1213     1213           
  Misses         67       67           

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