Do not increment the window when stream is closing.

Author: Lukasa

hyper/http20/stream.py

@@ -186,7 +186,9 @@ def receive_data(self, event):
         # Append the data to the buffer.
         self.data.append(event.data)
 
-        if increment and not self.remote_closed:
+        stream_about_to_close = (event.stream_ended is not None)
+
+        if increment and not self.remote_closed and not stream_about_to_close:
             with self._conn as conn:
                 conn.increment_flow_control_window(
                     increment, stream_id=self.stream_id

setup.py

@@ -78,7 +78,7 @@ def run_tests(self):
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: Implementation :: CPython',
     ],
-    install_requires=['h2>=2.3,<3.0', 'hyperframe>=3.2,<4.0'],
+    install_requires=['h2>=2.4,<3.0', 'hyperframe>=3.2,<4.0'],
     tests_require=['pytest', 'requests', 'mock'],
     cmdclass={'test': PyTest},
     entry_points={