Huge update

- Drop support for Python 3.7.
- Use offline geolocation database instead of ip-api.com.
- Add support for proxy authentication.
- Add pre-compiled binaries.
- Refactor the code by a lot.
- Simplify config.
- Add automatic text encoding detection.
- Use TOML instead of INI for configuration.
- Add support for using httpbin-compatible services and services which return plain IP address for getting proxy's exit node.
- Add support for reading proxy lists from local files.
- Add support for saving to json.
- Remove support for saving geolocation to txt, use json instead.
- Improve parser.
- Improve config validation.
- Use poetry instead of requirements.txt.
- Use venv in start scripts.

proxy_scraper_checker/null_context.py

@@ -1,9 +1,15 @@
 from __future__ import annotations
 
 
-class AsyncNullContext:
+class NullContext:
     __slots__ = ()
 
+    def __enter__(self) -> None:
+        pass
+
+    def __exit__(self, *_: object) -> None:
+        pass
+
     async def __aenter__(self) -> None:
         pass