Bump minimum hyper-h2 version.

Author: Lukasa

setup.py

@@ -53,7 +53,7 @@ def run_tests(self):
 
 
 def resolve_install_requires():
-    basic_dependencies = ['h2~=2.0', 'hyperframe~=3.2']
+    basic_dependencies = ['h2>=2.3,<3.0', 'hyperframe~=3.2']
 
     if py_version == (3, 3):
         basic_dependencies.extend(