Fix coverage

Author: chdemko

tests/__init__.py

@@ -1,6 +1,6 @@
 from unittest import TestCase
 
-from helper import verify_conversion
+from .helper import verify_conversion
 
 
 class ListingsTest(TestCase):

tests/test_listings_meta.py

@@ -1,6 +1,6 @@
 from unittest import TestCase
 
-from helper import verify_conversion
+from .helper import verify_conversion
 
 
 class NumberingTests(TestCase):

tests/test_numbering_meta.py

@@ -1,6 +1,6 @@
 from unittest import TestCase
 
-from helper import verify_conversion
+from .helper import verify_conversion
 
 
 class ParaTest(TestCase):

tests/test_para.py

@@ -1,6 +1,6 @@
 from unittest import TestCase
 
-from helper import verify_conversion
+from .helper import verify_conversion
 
 
 class ReferencincTest(TestCase):

tests/test_referencing.py

@@ -1,6 +1,6 @@
 from unittest import TestCase
 
-from helper import verify_conversion
+from .helper import verify_conversion
 
 
 class ReferencingMetaTest(TestCase):

tests/test_referencing_meta.py

@@ -1,6 +1,6 @@
 from unittest import TestCase
 
-from helper import verify_conversion
+from .helper import verify_conversion
 
 
 class TermTest(TestCase):