Better types

[Baptouuuu]

• Better protect internals
• Let Psalm understand the types (no need to specify the types everywhere)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.80%. Comparing base (76f7a21) to head (ad1539a).

Additional details and impacted files

@@              Coverage Diff              @@
##             develop       #6      +/-   ##
=============================================
+ Coverage      93.54%   93.80%   +0.25%     
- Complexity        98      105       +7     
=============================================
  Files             15       15              
  Lines            310      323      +13     
=============================================
+ Hits             290      303      +13     
  Misses            20       20              

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