fix: TokensAnalyzer - handle unary operator in arrow functions

[kubawerlos]

Fixes #7861

[coveralls]

coverage: 96.029%. remained the same
when pulling 0348cea on 6b7562617765726c6f73:fix_TokensAnalyzer
into 438d5ea on PHP-CS-Fixer:master.

[Wirone]

@kubawerlos should handle unary operator in array functions be handle unary operator in anonymous functions 🤔?

[mvorisek]

should handle unary operator in array functions be handle unary operator in anonymous functions 🤔?

"arrow functions"? :)

[Wirone]

Thanks @kubawerlos 🍻