Enforce asyncio reactor in all platforms (#298)

Author: elacuesta

README.md

@@ -76,15 +76,14 @@ requests will be processed by the regular Scrapy download handler.
 
 ### Twisted reactor
 
-When running on GNU/Linux or macOS you'll need to
-[install the `asyncio`-based Twisted reactor](https://docs.scrapy.org/en/latest/topics/asyncio.html#installing-the-asyncio-reactor):
+[Install the `asyncio`-based Twisted reactor](https://docs.scrapy.org/en/latest/topics/asyncio.html#installing-the-asyncio-reactor):
 
 ```python
 # settings.py
 TWISTED_REACTOR = "twisted.internet.asyncioreactor.AsyncioSelectorReactor"
 ```
 
-This is not a requirement on Windows (see [Windows support](#windows-support))
+This is the default in new projects since [Scrapy 2.7](https://github.com/scrapy/scrapy/releases/tag/2.7.0).
 
 
 ## Basic usage

scrapy_playwright/handler.py

@@ -1,6 +1,5 @@
 import asyncio
 import logging
-import platform
 from contextlib import suppress
 from dataclasses import dataclass, field as dataclass_field
 from ipaddress import ip_address
@@ -132,8 +131,7 @@ class ScrapyPlaywrightDownloadHandler(HTTPDownloadHandler):
     def __init__(self, crawler: Crawler) -> None:
         super().__init__(settings=crawler.settings, crawler=crawler)
         _ThreadedLoopAdapter.start()
-        if platform.system() != "Windows":
-            verify_installed_reactor("twisted.internet.asyncioreactor.AsyncioSelectorReactor")
+        verify_installed_reactor("twisted.internet.asyncioreactor.AsyncioSelectorReactor")
         crawler.signals.connect(self._engine_started, signals.engine_started)
         self.stats = crawler.stats