Revert "Disable tabs except for indentation" (#68)

This reverts commit 142defc.

Author: sindresorhus

Diff for: index.js

@@ -64,12 +64,6 @@ module.exports = {
 		'no-regex-spaces': 'error',
 		'no-setter-return': 'error',
 		'no-sparse-arrays': 'error',
-		'no-tabs': [
-			'error',
-			{
-				allowIndentationTabs: true
-			}
-		],
 		'no-template-curly-in-string': 'error',
 		'no-unreachable': 'error',
 		'no-unreachable-loop': 'error',