Enhancement: Infer private property types from constructor

[localheinz]

This PR

• enables the inferPrivatePropertyTypeFromConstructor parameter for phpstan/phpstan

Follows #197.

[codecov]

Codecov Report

Merging #201 into 1.x will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##                1.x     #201   +/-   ##
=========================================
  Coverage     32.52%   32.52%           
  Complexity       42       42           
=========================================
  Files             3        3           
  Lines           206      206           
=========================================
  Hits             67       67           
  Misses          139      139

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