Add disposing Kotlin environment.

[arturdryomov]

Closes #2237.

CC @artem-zinnatullin

[artem-zinnatullin]

Looks good 👍

[artem-zinnatullin]

@arturbosch if possible can you please ship a new release once this is merged? Thanks :)

[codecov-io]

Codecov Report

Merging #2238 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@             Coverage Diff              @@
##             master    #2238      +/-   ##
============================================
+ Coverage     81.37%   81.38%   +<.01%     
- Complexity     2073     2074       +1     
============================================
  Files           343      343              
  Lines          5981     5984       +3     
  Branches       1086     1086              
============================================
+ Hits           4867     4870       +3     
  Misses          532      532              
  Partials        582      582

Impacted Files	Coverage Δ	Complexity Δ
...itlab/arturbosch/detekt/core/ProcessingSettings.kt	89.83% <100%> (+0.17%)	19 <1> (+1)	⬆️
.../io/gitlab/arturbosch/detekt/cli/runners/Runner.kt	87.23% <100%> (+0.27%)	10 <0> (ø)	⬇️
...osch/detekt/api/internal/KotlinEnvironmentUtils.kt	86.27% <100%> (+0.27%)	0 <0> (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 c44f8c2...c365e41. Read the comment docs.

[artem-zinnatullin]

My apologies, didn't realize you (@schalkms) were also a core maintainer, I thought only @arturbosch was :)