fix: fix clippy errors

[stepankuzmin]

No description provided.

[codecov]

Codecov Report

Merging #203 (c78594c) into master (3c01125) will not change coverage.
The diff coverage is 83.33%.

@@           Coverage Diff           @@
##           master     #203   +/-   ##
=======================================
  Coverage   48.40%   48.40%           
=======================================
  Files          14       14           
  Lines        1632     1632           
=======================================
  Hits          790      790           
  Misses        842      842           

Impacted Files	Coverage Δ
src/db_actor.rs	93.75% <ø> (ø)
src/function_source.rs	90.00% <ø> (ø)
src/source.rs	0.00% <ø> (ø)
src/server.rs	42.16% <66.66%> (ø)
src/table_source.rs	65.21% <66.66%> (ø)
src/composite_source.rs	84.21% <100.00%> (ø)
src/dev.rs	100.00% <100.00%> (ø)
src/utils.rs	66.66% <100.00%> (ø)

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