[UseDataClass] Do not report on inner classes

[Aksi0m]

The UseDataClass rule reports to use the data keyword on inner classes. Since data is incompatible with inner this PR fixes the behaviour.

[codecov]

Codecov Report

Merging #4344 (d4ef406) into main (adcca36) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##               main    #4344   +/-   ##
=========================================
  Coverage     84.23%   84.24%           
- Complexity     3259     3262    +3     
=========================================
  Files           474      474           
  Lines         10323    10326    +3     
  Branches       1825     1827    +2     
=========================================
+ Hits           8696     8699    +3     
  Misses          666      666           
  Partials        961      961           

Impacted Files	Coverage Δ
...tlab/arturbosch/detekt/rules/style/UseDataClass.kt	78.87% <100.00%> (+0.30%)	⬆️
...gitlab/arturbosch/detekt/rules/style/MayBeConst.kt	81.42% <0.00%> (+0.54%)	⬆️

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[BraisGabin]

@cortinico is that milestone correct? Shouldn't it be 1.20.0?

[cortinico]

Shouldn't it be 1.20.0?

Yup my bad. Let me close 1.19.0 👍