Fix phpdoc

[vearutop]

This PR enables array and mixed as default phpdoc types.

[codecov]

Codecov Report

Merging #24 into master will decrease coverage by 0.03%.
The diff coverage is 100%.

@@             Coverage Diff              @@
##             master      #24      +/-   ##
============================================
- Coverage      87.4%   87.36%   -0.04%     
- Complexity      465      466       +1     
============================================
  Files            37       37              
  Lines          1254     1258       +4     
============================================
+ Hits           1096     1099       +3     
- Misses          158      159       +1

Impacted Files	Coverage Δ	Complexity Δ
src/Types/ArrayOf.php	83.33% <100%> (ø)	6 <0> (ø)	⬇️
src/PhpNamedVar.php	58.69% <100%> (+3.93%)	18 <0> (+1)	⬆️
src/PhpClassProperty.php	56.52% <0%> (-4.35%)	9% <0%> (ø)

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