chore: add license-checker for license validation

[edodusi]

No description provided.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.42%. Comparing base (041e858) to head (40d4307).

Additional details and impacted files

@@            Coverage Diff            @@
##             master      #30   +/-   ##
=========================================
  Coverage     92.42%   92.42%           
  Complexity      293      293           
=========================================
  Files            65       65           
  Lines          1161     1161           
=========================================
  Hits           1073     1073           
  Misses           88       88           

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[silasjoisten]

@edodusi thanks what is the purpose of that? Is it needed?

[edodusi]

@silasjoisten yes it's needed per Storyblok's policy

[edodusi]

@silasjoisten this checks that the dependencies in composer are using an allowed license.
Allowed licenses are:

$allowedLicenses = [
    'MIT',
    'BSD-3-Clause',
    'Apache-2.0',
];