does the base test config need to extend the es6 config?

[travi]

eslint-config-gain/rules/tests/base.js

Lines 2 to 4 in 3e7cbf3

	extends: [
	'../es6.js'
	],

normally, the es6 config should already be applied to the root of the project, so this seems redundant at best, but it also makes it difficult to override rules in the root of a project and have that override apply to tests w/o duplicating the override in the test root.