Allow any type as method stub rejections.

[cornr]

Reverted the restrictions from version 2.4.0 again: All types (not only Error types) are possible as method rejections.
See #150

[codecov-commenter]

Codecov Report

Merging #199 into master will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #199      +/-   ##
==========================================
- Coverage   93.55%   93.54%   -0.01%     
==========================================
  Files          34       34              
  Lines         652      651       -1     
  Branches       80       80              
==========================================
- Hits          610      609       -1     
  Misses         30       30              
  Partials       12       12              

Impacted Files	Coverage Δ
src/ts-mockito.ts	96.72% <ø> (ø)
src/MethodStubSetter.ts	83.67% <100.00%> (-0.33%)	⬇️

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