fix docip bug & add support for python 3.11

[B1ACK917]

1. Fix: docip crawler bug

As mentioned in issue #204 , the bug in docip crawler will block the getter thread and thus cannot get proxy normally.
This PR is to fix the host:port parse logic in proxypool/crawlers/public/docip.py.

2. Add: support for python3.11
2.1 update requirements.txt
After python3.11, there is a variable name change for CFrame, which will cause the building failure when installing old version of gevent.
e.g.

In file included from src/gevent/_greenlet_primitives.c:1207:
      /tmp/pip-install-cox1kni6/gevent_420af8e5de034ff09b7c37217c08be8a/deps/greenlet/greenlet.h:42:5: error: unknown type name 'CFrame'
         42 |     CFrame* cframe;
            |     ^
      1 error generated.

Check this commit in CPython: [bpo-45431]Rename CFrame to _PyCFrame in the C API
They rename it from CFrame *cframe; to _PyCFrame *cframe; and this results in a large number of packages needing to be modified to adapt to CPython updates.
As Python 3.11 has been available for over a year, and Python 3.12 has been available for over two months, I think it's time to bump the requirements to support newer version of Python.

2.2 update proxypool/processors/tester.py
After python3.11, directly passing coroutines to asyncio loop is forbidden, which will cause TypeError on proxypool/processors/tester.py:85

 tasks = [self.test(proxy) for proxy in proxies]

as

  File "/usr/lib/python3.11/asyncio/tasks.py", line 415, in wait
    raise TypeError("Passing coroutines is forbidden, use tasks explicitly.")

TypeError: Passing coroutines is forbidden, use tasks explicitly.

I changed it to newer style for supporting newer Python version.
This is also mentioned in issue #201.

I tested these changes under Python 3.11 & Python 3.12 environment and verified they are running steadily.

Regards,
B1ACK917

[B1ACK917]

BTW, I found that in Python3.12, the code on proxypool/crawlers/__init__.py: 9

module = loader.find_module(name).load_module(name)

will cause an error.
This is because the find_module function is deprecated and it should be replaced with find_spec.
A valid fix is change it to

module = loader.find_spec(name).loader.load_module()

But because Python3.12 is not so widely supported yet, so I left it out of this PR.
I think you may want to fix it by yourself when you think it's time to add support for Python3.12, or I can open another PR sometime later.

Regards,
B1ACK917

[Germey]

Thanks for your contrinution, I will follow up more details on 3.12 support