Add test for boolean type PostgreSQL.

[terabytesoftw]

Q	A
Is bugfix?	❌
New feature?	✔️
Breaks BC?	❌

[what-the-diff]

PR Summary

• Addition of a New Test File
  A new test file named BooleanTest.php was added to confirm that a part of the database management system, specifically the yii\db\pgsql\Schema class, is working correctly. This is located in the tests/framework/db/pgsql/type/ directory. This change boosts the robustness of the system by assuring that this essential component functions as expected.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (7005d27) 47.95% compared to head (f3c1d0c) 47.95%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #20049   +/-   ##
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  Coverage   47.95%   47.95%           
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  Files         445      445           
  Lines       43887    43887           
=======================================
  Hits        21045    21045           
  Misses      22842    22842           

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