fix: increase timeout to 0.5 seconds

- In Windows specifically the reactor was left unclean by the
  HostnameEndpoint due to the tearDown method of
  test_downloader_handlers.py::HttpTestCase due to
  which the following 2 tests were failing:
  1. test_timeout_download_from_spider_server_hangs
  2. test_timeout_download_from_spider_nodata_rcvd
- Increasing the timeout fixed the test (in local)

setup.cfg

@@ -100,7 +100,7 @@ ignore_errors = True
 [mypy-tests.test_downloader_handlers]
 ignore_errors = True
 
-[mypy-tests.test_download_handlers_http2]
+[mypy-tests.test_downloader_handlers_http2]
 ignore_errors = True
 
 [mypy-tests.test_engine]

tests/test_downloader_handlers.py

@@ -287,7 +287,7 @@ class HttpTestCase(unittest.TestCase):
     def test_timeout_download_from_spider_nodata_rcvd(self):
         # client connects but no data is received
         spider = Spider('foo')
-        meta = {'download_timeout': 0.2}
+        meta = {'download_timeout': 0.5}
         request = Request(self.getURL('wait'), meta=meta)
         d = self.download_request(request, spider)
         yield self.assertFailure(d, defer.TimeoutError, error.TimeoutError)
@@ -296,7 +296,7 @@ class HttpTestCase(unittest.TestCase):
     def test_timeout_download_from_spider_server_hangs(self):
         # client connects, server send headers and some body bytes but hangs
         spider = Spider('foo')
-        meta = {'download_timeout': 0.2}
+        meta = {'download_timeout': 0.5}
         request = Request(self.getURL('hang-after-headers'), meta=meta)
         d = self.download_request(request, spider)
         yield self.assertFailure(d, defer.TimeoutError, error.TimeoutError)