Breaking: Add fixer-return to rules preset

[bmish]

All rules should have a category of either Rules or Tests since this is how those presets are generated.

Technically, this isn't a breaking change, since we're allowed to modify these presets any time, according to the README:

The list of recommended rules will only change in a major release of this plugin. However, new non-recommended rules might be added in a minor release of this plugin. Therefore, the using the all, rules, and tests presets is not recommended for production use, because the addition of new rules in a minor release could break your build.

Part of v4 release (#120).

[aladdin-add]

LGTM