fix(cycle-scripts-es-webpack): Test can now be written in ES6

[nickbalestra]

• I ran npm test for the package I'm modifying
• I used npm run commit instead of git commit

ISSUES CLOSED: #14
REPLACES #13

Rationale: Instead of adding a babel config file in the template, having it copied over when create-cycle-app create an app, we just configure it temporary via package.json . Once we take-off-training-wheels we remove the config from the package.json and we copy on the root as .bablrc file. In this way we can hide complexity away from the user, until the very moment he decide to do so.

IMHO, create-cycle-app should always try to hide complexity and just don't make the user think. Especially for core flavors. So any configuration and setting should be handled by create-cycle-app as much as possible leaving the user with a super clean project structure to work on and focus on.

@geovanisouza92 @Widdershin what you think? If you are ok with it, feel free to close #13 in favor of this

[Widdershin]

This looks good to me 😄

Feel free to close #13 and do it this way instead.

[geovanisouza92]

Really good job @nickbalestra! Thank you.

And thanks to @Widdershin for pointing the issue!