Actually use importlib_metadata on 3.7...

Author: Julian

sphinx_json_schema_spec/__init__.py

@@ -1,10 +1,14 @@
 from contextlib import suppress
 from datetime import datetime
-from importlib import metadata
 from pathlib import Path
 from urllib.parse import urljoin
 import urllib.request
 
+try:
+    from importlib import metadata
+except ImportError:
+    import importlib_metadata as metadata
+
 from docutils import nodes
 from lxml import html
 import certifi