Regex warning when deploying via heroku

[Archmonger]

Originally posted by @jamesflores in https://github.com/reactive-python/reactpy-django/discussions/232

Hello. I'm getting a warning when when deploying to Heroku but it doesn't seem to affect usage (so far). Just throught I would raise this. Here is a fragment of my deployment:

Enumerating objects: 17, done.
Counting objects: 100% (17/17), done.
Delta compression using up to 8 threads
Compressing objects: 100% (8/8), done.
Writing objects: 100% (9/9), 1.54 KiB | 1.54 MiB/s, done.
Total 9 (delta 5), reused 0 (delta 0), pack-reused 0
remote: Updated 285 paths from e2a5a69
remote: Compressing source files... done.
remote: Building source:
remote: 
remote: -----> Building on the Heroku-22 stack
remote: -----> Using buildpack: heroku/python
remote: -----> Python app detected
remote: -----> No Python version was specified. Using the same version as the last build: python-3.12.2
remote:        To use a different version, see: https://devcenter.heroku.com/articles/python-runtimes
remote: -----> No change in requirements detected, installing from cache
remote: -----> Using cached install of python-3.12.2
remote: -----> Installing pip 23.3.2, setuptools 68.2.2 and wheel 0.42.0
remote: -----> Installing SQLite3
remote: -----> Installing requirements with pip
remote:        Collecting setuptools==69.1.1 (from -r requirements.txt (line 50))
remote:          Downloading setuptools-69.1.1-py3-none-any.whl.metadata (6.2 kB)
remote:        Downloading setuptools-69.1.1-py3-none-any.whl (819 kB)
remote:        Installing collected packages: setuptools
remote:          Attempting uninstall: setuptools
remote:            Found existing installation: setuptools 68.2.2
remote:            Uninstalling setuptools-68.2.2:
remote:              Successfully uninstalled setuptools-68.2.2
remote:        Successfully installed setuptools-69.1.1
remote: -----> $ python manage.py collectstatic --noinput
remote:        /app/.heroku/python/lib/python3.12/site-packages/reactpy_django/router/resolvers.py:55: SyntaxWarning: invalid escape sequence '\*'
remote:          if pattern.endswith("\*$"):
remote:        366 static files copied to '/tmp/build_e1cb219b/staticfiles', 678 post-processed.

I'm using:

• reactpy==1.0.2
• reactpy-router==0.1.1
• reactpy_django==3.8.0