deps: bump typing-extensions from 4.1.1 to 4.2.0 (#228)

dependabot[bot] · web-flow · commit 841449a1f501 · 2022-05-03T07:44:48.000Z
diff --git a/example/requirements.txt b/example/requirements.txt
@@ -1,3 +1,3 @@
 asynction
 gevent-websocket==0.10.1
-typing-extensions==4.1.1
+typing-extensions==4.2.0
