Handle closed-time typos from SWP API and update local dev setup (#32)

* updated dependencies, fixed "geschlossen" parsing

* httpretty.core warning patch

---------

Co-authored-by: Hadrian Burkhardt <hadrian.burkhardt@gmx.de>

README.md

@@ -11,6 +11,28 @@ Among others, OpenMensa powers the popular [Mensa Uni Potsdam][steppschuh] Andro
 
 The current application is built with [Python][py], [PyOpenMensa][pom], and [Flask][flask]. Learn more about the technical details at [Read the Docs][rtd].
 
+## Local development (modern)
+
+Recommended: Python 3.12+.
+
+**Option A (uv, recommended)** ::
+
+    $ uv venv
+    $ uv pip install -e ".[dev]"
+    $ uv run flask --app stw_potsdam.views run
+
+**Option B (venv + pip)** ::
+
+    $ python -m venv .venv
+    $ . .venv/bin/activate
+    $ pip install -r requirements-dev.txt
+    $ FLASK_APP=stw_potsdam.views flask run
+
+**Legacy (Pipenv)** ::
+
+    $ pipenv install --dev
+    $ make run
+
 **Contributions** are always welcome, in particular if the response format of the canteens change. Feel free to file a PR with improvements.
 
 **Deployment** If in need of a deployment, file a PR to this fork: [kaifabian/om-parser-potsdam-v2][kai]. Kai is currently in charge of running an instance of the parser and the registration on the OpenMensa platform.