Fix psalm errors

[Baptouuuu]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 96.51972% with 15 lines in your changes missing coverage. Please review.

Project coverage is 97.91%. Comparing base (35a9eba) to head (93bd94a).
Report is 3 commits behind head on develop.

Files with missing lines	Patch %	Lines
src/Map/Uninitialized.php	45.00%	11 Missing ⚠️
src/Map/ObjectKeys.php	95.00%	1 Missing ⚠️
src/Map/Primitive.php	95.00%	1 Missing ⚠️
src/Sequence/Defer.php	97.77%	1 Missing ⚠️
src/Sequence/Lazy.php	97.77%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             develop      #38   +/-   ##
==========================================
  Coverage      97.91%   97.91%           
  Complexity      1049     1049           
==========================================
  Files             72       72           
  Lines           4216     4216           
==========================================
  Hits            4128     4128           
  Misses            88       88           

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