deps: remove custom Maven plugin versions

[olavloite]

Removes custom Maven plugin versions and instead relies on the versions specified in the shared configuration project.

[codecov]

Codecov Report

Merging #214 (16593ca) into postgresql-dialect (4c7ba75) will not change coverage.
The diff coverage is n/a.

@@                  Coverage Diff                  @@
##             postgresql-dialect     #214   +/-   ##
=====================================================
  Coverage                 79.73%   79.73%           
  Complexity                 1041     1041           
=====================================================
  Files                        91       91           
  Lines                      3543     3543           
  Branches                    423      423           
=====================================================
  Hits                       2825     2825           
  Misses                      553      553           
  Partials                    165      165           

Flag	Coverage Δ
all_tests	79.73% <ø> (ø)

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