Fix: Throw InvalidDefinition exception when concrete definition can not be instantiated

[localheinz]

This PR

• throws an InvalidDefinition exception when a concrete definition can not be instantiated

[codecov]

Codecov Report

Merging #301 into main will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##               main     #301      +/-   ##
============================================
+ Coverage     98.54%   98.56%   +0.02%     
- Complexity      100      102       +2     
============================================
  Files            23       23              
  Lines           274      279       +5     
============================================
+ Hits            270      275       +5     
  Misses            4        4              

Impacted Files	Coverage Δ	Complexity Δ
src/Definitions.php	92.30% <100.00%> (+0.64%)	11.00 <0.00> (+1.00)
src/Exception/InvalidDefinition.php	100.00% <100.00%> (ø)	2.00 <1.00> (+1.00)

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