fix: fix Codacy issues

dev/main.js

@@ -1,3 +1,4 @@
+/* global Vue */
 $(function() {
 	let App = require("./App.vue");
 

dev/utils.js

@@ -3,7 +3,7 @@ module.exports = {
 	filters: {
 		prettyJSON: function(json) {
 			if (json) {
-				json = JSON.stringify(json, undefined, 4);
+				json = JSON.stringify(json, null, 4);
 				json = json.replace(/&/g, "&amp;").replace(/</g, "&lt;").replace(/>/g, "&gt;");
 				return json.replace(/("(\\u[a-zA-Z0-9]{4}|\\[^u]|[^\\"])*"(\s*:)?|\b(true|false|null)\b|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?)/g, function (match) {
 					var cls = "number";
@@ -24,4 +24,4 @@ module.exports = {
 		}
 
 	}
-}
+};

test/unit/webpack.test.config.js

@@ -1,15 +1,15 @@
 var path = require("path");
-var webpack = require('webpack');
-var sourceDir = path.resolve(__dirname, '../../src');
+var webpack = require("webpack");
+var sourceDir = path.resolve(__dirname, "../../src");
 
 module.exports = {
-	devtool: '#inline-source-map',
+	devtool: "#inline-source-map",
 
 	module: {
 		preLoaders: [
 			{
 				test: /\.js$/,
-				loader: 'isparta',
+				loader: "isparta",
 				include: sourceDir,
 				exclude: /node_modules/
 			}
@@ -40,12 +40,12 @@ module.exports = {
 			},
 			{ 
 				test: /\.(woff2?|svg)$/, 
-				loader: 'url' 
-				//loader: 'url?limit=10000' 
+				loader: "url" 
+				//loader: "url?limit=10000" 
 			},
 			{ 
 				test: /\.(ttf|eot)$/, 
-				loader: 'url' 
+				loader: "url" 
 			}
 		],
 		noParse: [
@@ -54,21 +54,21 @@ module.exports = {
 	},
 
 	resolve: {
-		packageAlias: 'browser',   
+		packageAlias: "browser",   
 		alias: {
-			'src': sourceDir,
-			'sinon': 'sinon/pkg/sinon'
+			"src": sourceDir,
+			"sinon": "sinon/pkg/sinon"
 		}
 	},
 	plugins: [
 	],
 
 	vue: {
 		autoprefixer: {
-			browsers: ['last 2 versions']
+			browsers: ["last 2 versions"]
 		},
 		loaders: {
-			js: 'isparta'
+			js: "isparta"
 		}
 	}
 

webpack.build.config.js

@@ -49,7 +49,7 @@ module.exports = [
 		],
 
 		module: {
-			loaders: loaders
+			loaders
 		},
 
 		vue: {

webpack.dev.config.js

@@ -51,7 +51,7 @@ module.exports = {
 	],
 
 	module: {
-		loaders: loaders
+		loaders
 	},
 
 	resolve: {