Check incompatible operand values for greater/smaller operands

[janedbal]

Here is a more generic approach: https://github.com/shipmonk-rnd/phpstan-rules#allowcomparingonlycomparabletypes

Denies using comparison operators >,<,<=,>=,<=> over anything other than int|string|float|DateTimeInterface. Null is not allowed. Mixing different types in those operators is also forbidden, only exception is comparing floats with integers