Fix #276 Parse enum constraint correctly

[kitloong]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 94.11765% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 97.68%. Comparing base (f592594) to head (0b99e76).

Files with missing lines	Patch %	Lines
src/Database/Models/PgSQL/PgSQLColumn.php	94.11%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##                7.x     #280      +/-   ##
============================================
+ Coverage     97.63%   97.68%   +0.05%     
- Complexity      881      887       +6     
============================================
  Files            99       99              
  Lines          2448     2458      +10     
============================================
+ Hits           2390     2401      +11     
+ Misses           58       57       -1     

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