Limit httpx version to 0.27.2

Author: ArtyomVancyan

setup.cfg

@@ -43,7 +43,7 @@ packages =
     fastapi_oauth2
 install_requires =
     fastapi>=0.68.1
-    httpx>=0.23.0
+    httpx>=0.23.0,<=0.27.2
     oauthlib>=3.2.2
     python-jose>=3.3.0
     social-auth-core>=4.4.2