Clean dumper

[evgeniy-r]

✓ Checklist:

• This PR has been added to CHANGELOG.md (at the top of the list);
• Tests for the changes have been added (for bug fixes / features).

[codecov-commenter]

Codecov Report

Merging #132 (105fc50) into main (81dd504) will decrease coverage by 3.33%.
The diff coverage is 72.56%.

@@            Coverage Diff             @@
##             main     #132      +/-   ##
==========================================
- Coverage   88.62%   85.29%   -3.34%     
==========================================
  Files          52       52              
  Lines        3192     3217      +25     
==========================================
- Hits         2829     2744      -85     
- Misses        363      473     +110     

Impacted Files	Coverage Δ
cli/pg_datanymizer/src/app.rs	44.61% <0.00%> (-5.39%)	⬇️
datanymizer_dumper/src/postgres/table.rs	95.36% <ø> (ø)
datanymizer_dumper/src/postgres/dumper.rs	36.72% <66.66%> (-51.36%)	⬇️
datanymizer_dumper/src/indicator.rs	100.00% <100.00%> (ø)
datanymizer_dumper/src/lib.rs	58.82% <100.00%> (-38.24%)	⬇️
...atanymizer_dumper/src/postgres/schema_inspector.rs	88.40% <100.00%> (-1.45%)	⬇️
datanymizer_dumper/src/postgres/query_wrapper.rs	28.57% <0.00%> (-19.05%)	⬇️
datanymizer_engine/src/settings/mod.rs	91.42% <0.00%> (-6.67%)	⬇️
... and 1 more

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