test: add pytest-timeout with a 20 second hard timeout

Author: allenporter

poetry.lock

@@ -46,6 +46,7 @@ codespell = "*"
 pyshark = "^0.6"
 aioresponses = "^0.7.7"
 freezegun = "^1.5.1"
+pytest-timeout = "^2.3.1"
 
 [tool.semantic_release]
 branch = "main"
@@ -75,3 +76,4 @@ asyncio_default_fixture_loop_scope = "function"
 log_cli_level = "DEBUG"
 log_format = "%(asctime)s %(levelname)s %(name)s:%(lineno)s %(message)s"
 log_date_format = "%Y-%m-%d %H:%M:%S"
+timeout = 20