Fixing setup.py so tests build

Author: glenrobson

setup.py

@@ -28,13 +28,15 @@ def run(self):
     name='iiif-presentation-validator',
     version='0.0.3',
     scripts=['iiif-presentation-validator.py'],
+    packages=['schema'],
     classifiers=["Development Status :: 4 - Beta",
                  "Intended Audience :: Developers",
                  "Operating System :: OS Independent",
                  "Programming Language :: Python",
-                 "Programming Language :: Python :: 3.7",
                  "Programming Language :: Python :: 3.8",
                  "Programming Language :: Python :: 3.9",
+                 "Programming Language :: Python :: 3.10",
+                 "Programming Language :: Python :: 3.11",
                  "Topic :: Internet :: WWW/HTTP",
                  "Topic :: Multimedia :: Graphics :: Graphics Conversion",
                  "Topic :: Software Development :: "