Fix errors on Python 3.7/3.8

Fixes #40

README.md

@@ -17,7 +17,7 @@ You can get proxies obtained using this script in [monosans/proxy-list](https://
 
 - Download and unpack [the archive with the program](https://github.com/monosans/proxy-scraper-checker/archive/refs/heads/main.zip).
 - Edit `config.ini` according to your preference.
-- Install [Python](https://python.org/downloads) (Windows 7 requires Python 3.8.X). During installation, be sure to check the box `Add Python to PATH`.
+- Install [Python](https://python.org/downloads) (minimum supported version is 3.7). During installation, be sure to check the box `Add Python to PATH`.
 - Install dependencies and run the script. There are 2 ways to do this:
   - Automatic:
     - On Windows run `start.cmd`

proxy_scraper_checker/__main__.py

@@ -50,17 +50,16 @@ def get_config(file: str) -> ConfigParser:
     return cfg
 
 
-def main() -> None:
-    set_event_loop_policy()
-
+async def main() -> None:
     cfg = get_config("config.ini")
 
     console = Console()
     configure_logging(console, debug=cfg["General"].getboolean("Debug", False))
 
     psc = ProxyScraperChecker.from_configparser(cfg, console=console)
-    asyncio.run(psc.run())
+    await psc.run()
 
 
 if __name__ == "__main__":
-    main()
+    set_event_loop_policy()
+    asyncio.run(main())