CI: upgrade poetry to 1.8.4

Author: csernazs

.github/workflows/ci.yml

@@ -9,7 +9,7 @@ on:
       - master
 
 env:
-  POETRY_VERSION: "1.8.3"
+  POETRY_VERSION: "1.8.4"
 
 jobs:
   cs:

tests/test_release.py

@@ -26,7 +26,7 @@
 
 NAME = "pytest-httpserver"
 NAME_UNDERSCORE = NAME.replace("-", "_")
-PY_MAX_VERSION = (3, 12)
+PY_MAX_VERSION = (3, 13)
 
 
 @pytest.fixture(scope="session")