tools: enable arrow functions in .eslintrc

tools: enable arrow functions in .eslintrc · nodejs/node@59d0373

Original file line number	Diff line number	Diff line change
`@@ -3,15 +3,16 @@ env:`
`3`	`3`
`4`	`4`	`# enable ECMAScript features`
`5`	`5`	`ecmaFeatures:`
`6`		`- blockBindings: true`
`7`		`- templateStrings: true`
`8`		`- octalLiterals: true`
	`6`	`+ arrowFunctions: true`
`9`	`7`	`binaryLiterals: true`
`10`		`- generators: true`
	`8`	`+ blockBindings: true`
	`9`	`+ classes: true`
`11`	`10`	`forOf: true`
`12`		`-objectLiteralShorthandProperties: true`
	`11`	`+generators: true`
`13`	`12`	`objectLiteralShorthandMethods: true`
`14`		`- classes: true`
	`13`	`+ objectLiteralShorthandProperties: true`
	`14`	`+ octalLiterals: true`
	`15`	`+ templateStrings: true`
`15`	`16`
`16`	`17`	`rules:`
`17`	`18`	`# Possible Errors`