Update PostgresDriver.php

[wolfy-j]

• drastic increase of insert statements on pg driver with complex primary keys

[codecov[bot]]

Codecov Report

Merging #122 (2a600c8) into 2.x (3d5cb74) will not change coverage. The diff coverage is 100.00%.

@@            Coverage Diff            @@
##                2.x     #122   +/-   ##
=========================================
  Coverage     94.68%   94.68%           
  Complexity     1667     1667           
=========================================
  Files            96       96           
  Lines          4496     4496           
=========================================
  Hits           4257     4257           
  Misses          239      239           

Impacted Files	Coverage Δ
src/Driver/Postgres/PostgresDriver.php	93.33% <100.00%> (ø)