Created by: noxan
Moved all eslint-plugin-* to peer/dev dependency section of package.json as stated in the official documentation, see http://eslint.org/docs/developer-guide/working-with-plugins#peer-dependency
Changes are motivated by the following issue of breaking the lint command if packages were installed with yarn, see https://github.com/eslint/eslint/issues/8547
Maybe it would be better to define a more generic version range for the packages, just let me know what you think is best.