Rename eslint files

[richardscarrott]

Rename files so we can lint the node build tasks -- proposed setup in the boilerplate is this:

.
├── server
│   └── .eslintrc /* extends .eslint-node */
├── src
│   ├── .eslintrc /* extends .eslint-react */
└── tasks
    ├── .eslintrc /* extends .eslint-node */
    └── build
        ├── webpack.config.js
        └── webpack.release.config.js

[mderrick]

👍