Fix factory with (wrong) array class name seed

[mvorisek]

No description provided.

[codecov]

Codecov Report

Merging #181 into develop will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             develop     #181   +/-   ##
==========================================
  Coverage      96.94%   96.94%           
- Complexity       442      443    +1     
==========================================
  Files             24       24           
  Lines           1047     1047           
==========================================
  Hits            1015     1015           
  Misses            32       32           

Impacted Files	Coverage Δ	Complexity Δ
src/FactoryTrait.php	100.00% <100.00%> (ø)	42.00 <0.00> (+1.00)

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