fix: Return id AS id

[EnriqueL8]

Tested in the database

[codecov-io]

Codecov Report

Merging #43 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master      #43   +/-   ##
=======================================
  Coverage   73.79%   73.79%           
=======================================
  Files           3        3           
  Lines         458      458           
=======================================
  Hits          338      338           
  Misses        120      120

Flag	Coverage Δ
#SwiftKueryPostgreSQL	73.79% <100%> (ø)	⬆️

Impacted Files	Coverage Δ
...es/SwiftKueryPostgreSQL/PostgreSQLConnection.swift	61.9% <100%> (ø)	⬆️

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