Fix: Avoid ternary statement

[localheinz]

This PR

• avoids a ternary statement

Follows #1.
Blocks #129.

[codecov]

Codecov Report

Merging #130 into master will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##             master     #130      +/-   ##
============================================
+ Coverage     95.45%   95.47%   +0.02%     
  Complexity       71       71              
============================================
  Files            12       12              
  Lines           198      199       +1     
============================================
+ Hits            189      190       +1     
  Misses            9        9              

Impacted Files	Coverage Δ	Complexity Δ
src/FixtureFactory.php	93.45% <100.00%> (+0.06%)	39.00 <0.00> (ø)

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