Left file: appwork-v1_2_2/vue-starter/babel.config.js  
Right file: appwork-v1_3_0/vue-starter/babel.config.js  

1	module.exports = {	=	1	module.exports = {
2	presets: [		2	presets: [
3	['@vue/app', {		3	['@vue/app', {
4	polyfills: [		4	polyfills: [
		-+	5	'es6.array.fill',
			6	'es6.array.iterator',
5	'es6.object.assign',	=	7	'es6.object.assign',
6	'es6.object.keys',		8	'es6.object.keys',
		<>	9	'es6.promise',
7	'es7.object.entries',		10	'es6.string.includes',
			11	'es6.symbol',
8	'es7.array.includes',	=	12	'es7.array.includes',
		<>	13	'es7.object.entries',
9	'es6.array.fill',		14	'es7.promise.finally',
10	'es6.symbol'		15	'es7.symbol.async-iterator'
11	]		16	],
			17	corejs: 2
12	}]	=	18	}]
13	]		19	]
14	}		20	}