Rename [wheel] section to [bdist_wheel] as the former is legacy (#231)

See:

54ddbcc9ce/wheel/bdist_wheel.py?fileviewer=file-view-default#bdist_wheel.py-119:125

http://pythonwheels.com/

setup.cfg

@@ -8,8 +8,8 @@ ignore =
 python-file-with-version = src/icalendar/__init__.py
 create-wheel = yes
 
-[wheel]
+[bdist_wheel]
 universal = 1
 
 [tool:pytest]
-norecursedirs = .* env* docs *.egg src/icalendar/tests/hypothesis
+norecursedirs = .* env* docs *.egg src/icalendar/tests/hypothesis