Fix minimum stability

[batopa]

This PR fixes the minimum stability in composer.json.
Moreover is added less restrictive deps for cakephp.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (7d3c90a) to head (6e85e09).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff             @@
##              master       #44   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
  Complexity        28        28           
===========================================
  Files              5         5           
  Lines            146       146           
===========================================
  Hits             146       146           

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