Fix a TypeError when a Distribution's old included attribute wa…

…s a `tuple` -- by :user:`Avasam`

newsfragments/4575.bugfix.rst

@@ -0,0 +1 @@
+Fix a `TypeError` when a ``Distribution``'s old included attribute was a `tuple` -- by :user:`Avasam`

newsfragments/4575.feature.rst

@@ -0,0 +1 @@
+Allows using `dict` where an ordered iterable (previously restricted to `tuple` or `list`) is expected -- by :user:`Avasam`

setuptools/dist.py

@@ -824,7 +824,7 @@ def _include_misc(self, name: str, value: _OrderedIterable):
             )
         else:
             new = [item for item in value if item not in old]
-            setattr(self, name, old + new)
+            setattr(self, name, list(old) + new)
 
     def exclude(self, **attrs):
         """Remove items from distribution that are named in keyword arguments