Cannot run the testing after install the exoplanet package: does not appear to be a Python project: neither 'setup.py' nor 'pyproject.toml' found.

**Describe the bug**
I followed the instructions in https://docs.exoplanet.codes/en/latest/user/install/. I installed the exoplanet through pip and initially it worked. However, when I tried to run the test
`python -m pip install -e ".[test]"`

It ran into error like this: does not appear to be a Python project: neither 'setup.py' nor 'pyproject.toml' found.

I'm using a Mac with M1 chip. My python has been upgraded to 3.10. Can anyone tell us what's wrong with it? What should I do to solve this problem?