conda-forge build failing on v4.8.13 because of src/sourmash/_lowlevel/__init__.py

[ctb]

In brief, I had a local src/sourmash/_lowlevel/__init__.py in my repo when I made the sdist, and that got included in the sdist, causing this error:

Caused by: File sourmash/_lowlevel/__init__.py was already added from $SRC_DIR/src/sourmash/_lowlevel/__init__.py, can't overwrite with generated file
│ │   Error: command ['maturin', 'pep517', 'build-wheel', '-i', '$PREFIX/bin/python', '--compatibility', 'off'] returned non-zero exit status 1
│ │   error: subprocess-exited-with-error

I am going to try to fix the conda-forge package with a post-download patch, but we should make sure to exclude this autogenerated file from future sdists.

Unfortunately neither

prune src/sourmash/_lowlevel/__init__.py

nor

exclude src/sourmash/_lowlevel/__init__.py

in MANIFEST.in seems to exclude it, so ... not sure how to best do this.

[ctb]

conda-forge/sourmash-minimal-feedstock#69

[ctb]

fixed by releasing 4.8.14 #3494