Export config with standard format

[ruimarinho]

• Removed babel as only tests could potentially benefit from transpiling.
• Cleaned up tests.
• Tidied up package.json.
• Fixed babel/generator-star-spacing rule to use "before" spacing instead of "after" (probably wasn't working at all?).

Might help with #13 and #18 too.

Closes #2.

[nunofgs]

Imho, the duplicate rules should be separated to another PR.

[ruiquelhas]

@ruimarinho needs rebase.

[ruiquelhas]

Why are you calling this a preset? Since we are dropping babel, I would suggest we use src/index.js for the config itself as described here instead of using a specific json file. That seems to be the most common format out there.

[ruiquelhas]

Any specific reason for removing this file?

[ruimarinho]

It's unnecessary. The license fields on the package manifest accepts any SPDX identifier, so "MIT" is enough there.

[ruimarinho]

@ruiquelhas rebased.

[ruimarinho]

Regarding src/index, the idea is to open the door to future presets, such as backend/frontend/es2015/es2016, but I'm fine with removing presets/seegno.json and inline it in src/index.js.

[ruimarinho]

E.g. https://github.com/Meetic/eslint-config-meetic

[ruiquelhas]

I just think we should stick to what is recommended by eslint. So, I would prefer to continue calling it config (there is no mention of preset anywhere in the docs) and keep it in the index.js file (avoiding premature optimization).

If the "standard" changes in the future, we can adapt accordingly.

[ruimarinho]

Works for me. PR updated.

[ruiquelhas]

I would probably change the PR name for the sake of clarity. Not sure exactly what to call it though.

[ruimarinho]

Do you have any suggestion or can this be merged?