Fix imports in tests

Author: simon04

tests/test_github.py

@@ -18,7 +18,7 @@
 
 import mock
 
-from compat import unittest
+from tests.compat import unittest
 
 from gitsome.github import GitHub
 from tests.mock_feed_parser import MockFeedParser

tests/test_github_cli.py

@@ -17,7 +17,7 @@
 from __future__ import print_function
 
 import mock
-from compat import unittest
+from tests.compat import unittest
 
 from click.testing import CliRunner