Add typing_extensions to requirements

Author: CoolCat467

test-requirements.in

@@ -8,6 +8,7 @@ trustme               # for the ssl + DTLS tests
 pylint                # for pylint finding all symbols tests
 jedi; implementation_name == "cpython"                  # for jedi code completion tests
 cryptography>=41.0.0  # cryptography<41 segfaults on pypy3.10
+typing_extensions >= 4.15.0
 
 # Tools
 black; implementation_name == "cpython"

test-requirements.txt

@@ -187,7 +187,7 @@ types-pyyaml==6.0.12.20250822
     # via -r test-requirements.in
 types-setuptools==80.9.0.20250822
     # via types-cffi
-typing-extensions==4.14.1
+typing-extensions==4.15.0
     # via
     #   -r test-requirements.in
     #   astroid