Update location of configuration to match codeclimate.
Update location of configuration to match codeclimate.

As of 0.8.1, the CLI supports this format:
https://github.com/codeclimate/codeclimate/releases/tag/v0.8.1

This fixes specifying extensions to be analyzed by ESLint

codeclimate/codeclimate-eslint,codeclimate/codeclimate-eslint,derekhubbard/codeclimate-eslint,derekhubbard/codeclimate-eslint