Merge pull request #37 from theochem/pypi3

Clean up package structure

Author: FanwangM

pyproject.toml

@@ -103,6 +103,7 @@ B3DB = ["*.csv", "*.tsv", "*.tsv.gz"]
 # Python modules and packages that are included in the
 # distribution package (and therefore become importable)
 [tool.setuptools.packages.find]
+include = ["B3DB"]
 exclude = [
     "*/*/tests",
     "tests_*",