Add NX, XX, GT and LT to expire and pexpire

[WisdomPill]

Problem Statement
It would be nice to fully support NX, XX, GT and LT to make it more efficient to do complex operations.
Have a look here and here

Describe the solution you'd like
Just add the flags and the tests

[sauravsharma1998]

@WisdomPill Do you want something like this?

def expire(
        self,
        key: KeyT,
        timeout: ExpiryT,
        version: Optional[int] = None,
        client: Optional[Redis] = None,
        nx: bool = False,
        xx: bool = False,
        gt: bool = False,
        lt: bool = False,
    ) -> bool:
        # Code Here

[WisdomPill]

Hello @sauravsharma1998,

I would say yes

Hi @WisdomPill,
I see the other PR has been inactive for a while, is this issue available?
I'm new to open-source and would love to take this up.

[WisdomPill]

@whoiskrtk2 sure, you can follow that PR and fix the underlying issues

Sure @WisdomPill, I'll start working on this. Thanks!