Updating client license to clear, MIT

[chayim]

This pull request exists to unify all of our clients until the MIT license. In the case of some repositories this is more permissive, than the prior BSD-3-Clause.

[codecov-commenter]

Codecov Report

Patch and project coverage have no change.

Comparison is base (b58833b) 95.70% compared to head (ca2649d) 95.70%.

❗ Current head ca2649d differs from pull request most recent head f93df2f. Consider uploading reports for the commit f93df2f to get more accurate results

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Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2596   +/-   ##
=======================================
  Coverage   95.70%   95.70%           
=======================================
  Files         456      456           
  Lines        4561     4561           
  Branches      524      524           
=======================================
  Hits         4365     4365           
  Misses        127      127           
  Partials       69       69           

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