Merge pull request #466 from rajulkumar/fix_importlib_metadata_version

Fix importing version from importlib.metadata for py<3.8

src/pushsource/_impl/compat_attr.py

@@ -1,6 +1,14 @@
-from importlib.metadata import version
 import attr
 
+# importlib.metadata is available for py3.8 and higher
+# previous versions get it from importlib_metadata installed
+# from importlib-metadata
+try:
+ from importlib.metadata import version
+except ImportError: # pragma: no cover
+ from importlib_metadata import version
+
+
 # Wrappers for attr module to deal with some incompatibilities between versions