In definition validator add a check of method name in array definitions

[vjik]

Q	A
Is bugfix?	❌
New feature?	✔️
Breaks BC?	❌
Fixed issues	partly #45

[what-the-diff]

• Added a check of method name in array definitions.
• Improved variadic arguments support for methods of array definitions and added autowiring to them.
• Raised minimum PHP version to 8.0 and refactored code (removed unused variables, improved performance).

[codecov]

Codecov Report

Base: 100.00% // Head: 100.00% // No change to project coverage 👍

Coverage data is based on head (0d11339) compared to base (f21846c).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@             Coverage Diff             @@
##              master       #46   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
- Complexity       209       210    +1     
===========================================
  Files             14        14           
  Lines            455       458    +3     
===========================================
+ Hits             455       458    +3     

Impacted Files	Coverage Δ
src/ArrayDefinition.php	100.00% <ø> (ø)
src/Helpers/DefinitionValidator.php	100.00% <100.00%> (ø)

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