chore(deps): update kotlin to v1.9.20

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
org.jetbrains.kotlin.kapt	1.9.10 -> 1.9.20
org.jetbrains.kotlin.plugin.spring	1.9.10 -> 1.9.20
org.jetbrains.kotlin.jvm	1.9.10 -> 1.9.20

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[codecov]

Codecov Report

Merging #283 (f8aa92d) into main (35b46b0) will increase coverage by 0.14%.
Report is 3 commits behind head on main.
The diff coverage is n/a.

@@             Coverage Diff              @@
##               main     #283      +/-   ##
============================================
+ Coverage     75.24%   75.38%   +0.14%     
- Complexity      306      307       +1     
============================================
  Files            69       69              
  Lines          1353     1353              
  Branches        154      154              
============================================
+ Hits           1018     1020       +2     
+ Misses          199      196       -3     
- Partials        136      137       +1     

Flag	Coverage Δ
unittests	75.38% <ø> (+0.14%)	⬆️

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see 1 file with indirect coverage changes