tests: self.assertEquals -> self.assertEqual

[pbsds]

fixes tests on python312

[pbsds]

example error:

pysnow> _______________________ TestResourceRequest.test_update ________________________
pysnow> 
pysnow> self = <tests.test_resource.TestResourceRequest testMethod=test_update>
pysnow> 
pysnow>     @httpretty.activate
pysnow>     def test_update(self):
pysnow>         """:meth:`update` should return a dictionary of the updated record"""
pysnow>     
pysnow>         httpretty.register_uri(
pysnow>             httpretty.GET,
pysnow>             self.mock_url_builder_base,
pysnow>             body=get_serialized_result(self.record_response_get_one),
pysnow>             status=200,
pysnow>             content_type="application/json",
pysnow>         )
pysnow>     
pysnow>         httpretty.register_uri(
pysnow>             httpretty.PUT,
pysnow>             self.mock_url_builder_sys_id,
pysnow>             body=get_serialized_result(self.record_response_update),
pysnow>             status=200,
pysnow>             content_type="application/json",
pysnow>         )
pysnow>     
pysnow>         response = self.resource.update(self.dict_query, self.record_response_update)
pysnow>         result = response.one()
pysnow>     
pysnow> >       self.assertEquals(type(result), dict)
pysnow> E       AttributeError: 'TestResourceRequest' object has no attribute 'assertEquals'. Did you mean: 'assertEqual'?