Update HTTP/2 support in `extras_require` (#1799)

* Update extras_require

* Update setup.py

diff --git a/setup.py b/setup.py
index 212aedf865aefa05cb026de9da4c82f2d9ffbd1f..8854039e21b935dbafb1203a2fe0e7ef4a71f758 100644 (file)
--- a/setup.py
+++ b/setup.py
@@ -63,7 +63,7 @@ setup(
         "async_generator; python_version < '3.7'"
     ],
     extras_require={
-        "http2": "h2==3.*",
+        "http2": "h2>=3,<5",
         "brotli": "brotlicffi==1.*",
     },
     classifiers=[