Simplify settings

[evgeniy-r]

✓ Checklist:

• This PR has been added to CHANGELOG.md (at the top of the list)).

[codecov-commenter]

Codecov Report

Merging #131 (c050732) into main (248c8da) will increase coverage by 9.20%.
The diff coverage is 89.74%.

❗ Current head c050732 differs from pull request most recent head 19643f7. Consider uploading reports for the commit 19643f7 to get more accurate results

@@            Coverage Diff             @@
##             main     #131      +/-   ##
==========================================
+ Coverage   79.43%   88.63%   +9.20%     
==========================================
  Files          52       52              
  Lines        3199     3193       -6     
==========================================
+ Hits         2541     2830     +289     
+ Misses        658      363     -295     

Impacted Files	Coverage Δ
cli/pg_datanymizer/src/app.rs	50.00% <0.00%> (ø)
datanymizer_dumper/src/postgres/connector.rs	96.42% <100.00%> (+19.07%)	⬆️
datanymizer_dumper/src/postgres/dumper.rs	88.08% <100.00%> (+54.74%)	⬆️
datanymizer_dumper/src/postgres/row.rs	91.48% <100.00%> (ø)
...atanymizer_dumper/src/postgres/schema_inspector.rs	89.85% <100.00%> (+89.85%)	⬆️
datanymizer_dumper/src/postgres/writer.rs	50.00% <100.00%> (+50.00%)	⬆️
datanymizer_engine/src/engine.rs	96.26% <100.00%> (ø)
datanymizer_engine/src/settings/mod.rs	98.09% <100.00%> (+17.58%)	⬆️
datanymizer_dumper/src/postgres/table.rs	95.36% <0.00%> (+8.27%)	⬆️
... and 9 more

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