[Bug-Candidate]: type_str(self) property in slithir/operations/unary.py not returning str

[DarrenChangJR]

Describe the issue:

    @property
    def type_str(self):
        return self._type.value

    def __str__(self):
        return f"{self.lvalue} = {self.type_str} {self.rvalue} "

type_str always returns 0 and 1 in place of "!" and "~" respectively. Is this intended behaviour?
If not, I will issue a pull request with below changes

    @property
    def type_str(self) -> str:
        return str(self._type)

Code example to reproduce the issue:

contract UnaryOperations {
uint256 public a = 10;
bool public b = true;

function executeUnaryOperations() public {
    a = -a; // Negation
    b = !b; // Logical negation
    a++; // Post-increment
    --a; // Pre-decrement
    a = ~a; // Bitwise negation
    a = +a; // Unary plus
}

}

Version:

0.9.3

Relevant log output:

No response

[0xalpharush]

@DarrenChangJR You're welcome to submit this patch as it should return a string.