Update pyoxigraph imports to fix test_store.py

python/tests/test_store.py

@@ -3,6 +3,7 @@ import unittest
 from io import BytesIO, RawIOBase
 
 from pyoxigraph import *
+from pyoxigraph.pyoxigraph import QuerySolutions, QuerySolution, QueryTriples
 from tempfile import NamedTemporaryFile
 
 foo = NamedNode("http://foo")