Restore support for EntryPoint construction with positional args.

Author: jaraco

importlib_metadata/__init__.py

@@ -156,7 +156,7 @@ class EntryPoint:
 
     dist: Optional['Distribution'] = None
 
-    def __init__(self, *, name, value, group):
+    def __init__(self, name, value, group):
         vars(self).update(name=name, value=value, group=group)
 
     def load(self):

tests/test_main.py

@@ -232,6 +232,12 @@ def test_entry_point_pickleable(self):
         revived = pickle.loads(pickle.dumps(self.ep))
         assert revived == self.ep
 
+    def test_positional_args(self):
+        """
+        Capture legacy (namedtuple) construction, discouraged.
+        """
+        EntryPoint('name', 'value', 'group')
+
     def test_immutable(self):
         """EntryPoints should be immutable"""
         with self.assertRaises(AttributeError):