Fix path to data/licenses.json

When we install and run this from CI, this file needs to exist in
the package's folder inside site-packages. Then we can use __file__
to get the path relative to the package.

See: https://python-packaging.readthedocs.io/en/latest/non-code-files.html

csv_metadata_quality/util.py

@@ -2,7 +2,7 @@
 
 
 import json
-from importlib.resources import files
+import os
 
 from ftfy.badness import is_bad
 
@@ -58,7 +58,7 @@ def is_mojibake(field):
 def load_spdx_licenses():
     """Returns a Python list of SPDX short license identifiers."""
 
-    with open(files("csv_metadata_quality").joinpath("data/licenses.json")) as f:
+    with open(os.path.join(os.path.dirname(__file__), "data/licenses.json")) as f:
         licenses = json.load(f)
 
     # List comprehension to extract the license ID for each license