Add timeout to diagnose TCP branch hanged tests

Author: krassowski

python_packages/jupyter_lsp/setup.cfg

@@ -61,3 +61,4 @@ addopts =
     --cov-report term-missing:skip-covered
     -p no:warnings
     --flake8
+timeout = 300

requirements/github-actions.yml

@@ -34,6 +34,7 @@ dependencies:
   # test tools
   - pytest-asyncio
   - pytest-cov
+  - pytest-timeout
   # temporary pin added on 2022-12-28, if editing this file try to remove it:
   # pytoolconfig 1.2.4 depends on packaging>=22.0 which breaks `pip check`
   - pytoolconfig <1.2.4

requirements/utest.txt

@@ -5,5 +5,6 @@ pytest-asyncio
 pytest-cov
 pytest-flake8
 pytest-runner
+pytest-timeout
 python-lsp-server
 pluggy<1.0,>=0.12  # Python 3.5 CI Travis, may need update with new pytest releases, see issue 259