allow initing Pymem objects with process id

[StarrFox]

This pull request allows you to pass a process id to Pymem as in:

process = pymem.Pymem(123)

this is a lot more concise than the previous method of doing:

process = pymem.Pymem()
process.open_process_from_id(123)
process.check_wow64()

I kept the argument name as process_name in case someone was using it as a keyword arg like in:

pymem.Pymem(process_name="process.exe")

[StarrFox]

issues fixed and version bumped

[StarrFox]

it would seem that none check is actually still needed because the default is None

[srounet]

it would seem that none check is actually still needed because the default is None

👍

[srounet]

@StarrFox you Can merge. I ll keep an eye on ci and see if it releases on pypi