Address deprecation warnings (#249)

Author: ellert

metakernel/tests/test_expect.py

@@ -110,4 +110,4 @@ def test_expect_timeout (self):
 if __name__ == '__main__':
     unittest.main()
 
-suite = unittest.makeSuite(ExpectTestCase, 'test')
+suite = unittest.TestLoader().loadTestsFromTestCase(ExpectTestCase)

pyproject.toml

@@ -75,6 +75,7 @@ filterwarnings= [
   # Fail on warnings
   "error",
   "ignore:the imp module is deprecated:DeprecationWarning:ipykernel",
+  "ignore:The distutils package is deprecated:DeprecationWarning:ipykernel",
   "ignore:distutils Version classes:DeprecationWarning:ipyparallel",
   "ignore:unclosed event loop:ResourceWarning",
   "ignore:There is no current event loop:DeprecationWarning"