[issue-15271] upgrade postgres driver

[pjfanning]

Fixes #15271

Changes proposed in this pull request:

• pom change

[codecov-commenter]

Codecov Report

Merging #15272 (748ddcd) into master (5957e6c) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master   #15272   +/-   ##
=========================================
  Coverage     60.21%   60.21%           
  Complexity     1933     1933           
=========================================
  Files          3187     3187           
  Lines         47656    47656           
  Branches       8099     8099           
=========================================
  Hits          28694    28694           
  Misses        16643    16643           
  Partials       2319     2319           

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[TeslaCN]

The driver 42.3.2 has concurrent performance issue, which impacted performance of ShardingSphere. pgjdbc/pgjdbc#2450

[pjfanning]

@TeslaCN thanks for investigating and raising the issue. The postgresql jar could be set to 42.2.25 instead of 42.3.2 - that has the security fix too - GHSA-v7wg-cpwc-24m4 - do you know if 42.2.25 has the perf issue?

@terrymanu do you think it is best to change jar version again?