ServiceNOW SDK Warning

Looks like the method this pack uses to get results(servicenow.get) is going to be deprecated.

```text
/opt/stackstorm/virtualenvs/servicenow/lib/python3.6/site-packages/pysnow/client.py:120: DeprecationWarning: `query` is deprecated and will be removed in a future release. Please use `resource()`
```