In setup.cfg, avoid deprecated license_file (#1207)

musicinmybrain · web-flow · commit c5e91caf0a25 · 2023-11-29T13:12:33.000-05:00
Use license_files instead. https://setuptools.pypa.io/en/latest/userguide/declarative_config.html
diff --git a/setup.cfg b/setup.cfg
@@ -2,4 +2,4 @@
 universal = False
 
 [metadata]
-license_file = LICENSE
+license_files = LICENSE
