Resolve "Change the processing of the `stories` rule to a `height` GEM Taxonomy tag"

Closes #15 (closed)

tests/test_height_and_floorspace_rule.py

 import logging
-import pytest
 
 logger = logging.getLogger()
 
-def test_height_and_floorspace(height_and_floorspace_rule):
+
+def test_height_and_floorspace_rule(height_and_floorspace_rule):
     tags = {"building:levels": 5, "roof:levels": 2, "building:min_level": 2}
     area = 300.0
     height_and_floorspace_rule(**{"tags": tags, "area": area})