chore: improve code quality

[ubogdan]

Describe the PR
Improve code quality

Relation issue
None

Additional context
None

[codecov]

Codecov Report

Merging #1184 (6619b51) into master (d209f71) will increase coverage by 0.31%.
The diff coverage is 98.55%.

❗ Current head 6619b51 differs from pull request most recent head 1e188f7. Consider uploading reports for the commit 1e188f7 to get more accurate results

@@            Coverage Diff             @@
##           master    #1184      +/-   ##
==========================================
+ Coverage   94.71%   95.03%   +0.31%     
==========================================
  Files          10       10              
  Lines        2460     2557      +97     
==========================================
+ Hits         2330     2430     +100     
- Misses         68       69       +1     
+ Partials       62       58       -4     

Impacted Files	Coverage Δ
schema.go	100.00% <ø> (ø)
swagger.go	100.00% <ø> (ø)
packages.go	85.47% <91.30%> (-0.41%)	⬇️
parser.go	92.87% <98.38%> (+0.46%)	⬆️
field_parser.go	99.11% <98.71%> (+0.29%)	⬆️
formatter.go	100.00% <100.00%> (ø)
gen/gen.go	93.26% <100.00%> (-0.07%)	⬇️
operation.go	96.35% <100.00%> (+0.33%)	⬆️
spec.go	100.00% <100.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update d209f71...1e188f7. Read the comment docs.