python 3.7 install failing on fcs branch

[kkappler]

Testing fourier_coefficients branch of aurora, passing on python 3.8, 3.9, 3.10, but not on 3.7

@kujaku11
Considering that obspy has moved to minimum supported branch of 3.8, I wonder if we should just drop 3.7 and move on?

FWIW here is the traceback:

Running command git checkout -b fcs --track origin/fcs
Switched to a new branch 'fcs'
branch 'fcs' set up to track 'origin/fcs'.
Resolved https://github.com/kujaku11/mt_metadata.git to commit b266c11
Preparing metadata (setup.py): started
Preparing metadata (setup.py): finished with status 'error'
error: subprocess-exited-with-error
× python setup.py egg_info did not run successfully.
│ exit code: 1
╰─> [19 lines of output]
Traceback (most recent call last):
File "", line 36, in
File "", line 14, in
File "/usr/share/miniconda/envs/aurora-test/lib/python3.7/site-packages/setuptools/init.py", line 18, in
from setuptools.dist import Distribution
File "/usr/share/miniconda/envs/aurora-test/lib/python3.7/site-packages/setuptools/dist.py", line 33, in
from ._importlib import metadata
File "/usr/share/miniconda/envs/aurora-test/lib/python3.7/site-packages/setuptools/_importlib.py", line 39, in
disable_importlib_metadata_finder(metadata)
File "/usr/share/miniconda/envs/aurora-test/lib/python3.7/site-packages/setuptools/_importlib.py", line 12, in disable_importlib_metadata_finder
import importlib_metadata
File "/usr/share/miniconda/envs/aurora-test/lib/python3.7/site-packages/importlib_metadata/init.py", line 6, in
import zipp
File "/usr/share/miniconda/envs/aurora-test/lib/python3.7/site-packages/zipp/init.py", line 10, in
from .py310compat import text_encoding
File "/usr/share/miniconda/envs/aurora-test/lib/python3.7/site-packages/zipp/py310compat.py", line 5
def _text_encoding(encoding, stacklevel=2, /):
^
SyntaxError: invalid syntax
[end of output]
note: This error originates from a subprocess, and is likely not a problem with pip.
error: metadata-generation-failed
× Encountered error while generating package metadata.
╰─> See above for output.
note: This is an issue with the package mentioned above, not pip.
hint: See above for details.
Error: Process completed with exit code 1.

[kujaku11]

Remove dependency on 3.7, so we'll call this fixed.