Update spek framework to 2.0.13

[schalkms]

Release note:
https://github.com/spekframework/spek/releases/tag/2.0.13

[codecov]

Codecov Report

Merging #3070 into master will decrease coverage by 0.01%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #3070      +/-   ##
============================================
- Coverage     79.27%   79.26%   -0.02%     
  Complexity     2563     2563              
============================================
  Files           432      432              
  Lines          7725     7726       +1     
  Branches       1468     1469       +1     
============================================
  Hits           6124     6124              
  Misses          816      816              
- Partials        785      786       +1     

Impacted Files	Coverage Δ	Complexity Δ
...arturbosch/detekt/rules/bugs/IgnoredReturnValue.kt	75.51% <0.00%> (-1.58%)	14.00% <0.00%> (ø%)

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[arturbosch]

Nice parallel=false by default like junit-jupiter :)
Thanks @raniejade !

[arturbosch]

Strange scripting compiler error, can you reproduce it locally?

nit: SPEK2_TIMEOUT is deprecated please use spek2.execution.test.timeout instead.

[schalkms]

@arturbosch I could also see the issued warning locally.
The compileSnippets failure is not reproducible on my local machine. We have had this issue previously though. This happens without having multithreaded test discovery and execution enabled in spek.