chore: bump deps and fix deprecations (#702)

@babel/polyfill                      ^7.10.4  →   ^7.11.5
 axios                                ^0.19.2  →   ^0.20.0
 ejs                                   ^3.1.3  →    ^3.1.5
 mqtt                                  ^4.1.0  →    ^4.2.1
 serialport                            ^9.0.0  →    ^9.0.1
 vue                                  ^2.6.11  →   ^2.6.12
 vue-router                            ^3.3.4  →    ^3.4.3
 vuetify                               ^2.3.4  →   ^2.3.10
 @babel/core                          ^7.10.4  →   ^7.11.5
 @babel/plugin-proposal-decorators    ^7.10.4  →   ^7.10.5
 @babel/plugin-transform-runtime      ^7.10.4  →   ^7.11.5
 @babel/preset-env                    ^7.10.4  →   ^7.11.5
 autoprefixer                          ^9.8.5  →    ^9.8.6
 c8                                    ^7.2.1  →    ^7.3.0
 copy-webpack-plugin                   ^6.0.3  →    ^6.1.0
 css-loader                            ^3.6.0  →    ^4.2.2
 eslint                                ^7.4.0  →    ^7.8.1
 file-loader                           ^6.0.0  →    ^6.1.0
 html-webpack-plugin                   ^4.3.0  →    ^4.4.1
 lodash                              ^4.17.19  →  ^4.17.20
 material-design-icons-iconfont        ^5.0.1  →    ^6.0.1
 mini-css-extract-plugin               ^0.9.0  →   ^0.11.0
 mocha                                 ^8.0.1  →    ^8.1.3
 node-notifier                         ^7.0.1  →    ^8.0.0
 optimize-css-assets-webpack-plugin    ^5.0.3  →    ^5.0.4
 ora                                   ^4.0.4  →    ^5.0.0
 portfinder                           ^1.0.26  →   ^1.0.28
 release-it                           ^13.6.5  →   ^13.7.0
 sass-loader                           ^9.0.2  →   ^10.0.1
 sinon                                 ^9.0.2  →    ^9.0.3
 terser-webpack-plugin                 ^3.0.6  →    ^4.1.0
 vue-template-compiler                ^2.6.11  →   ^2.6.12
 webpack                              ^4.43.0  →   ^4.44.1
 webpack-merge                         ^5.0.9  →    ^5.1.3

build/utils.js

@@ -19,7 +19,8 @@ exports.cssLoaders = function (options) {
   const cssLoader = {
     loader: 'css-loader',
     options: {
-      sourceMap: options.sourceMap
+      sourceMap: options.sourceMap,
+      esModule: false
     }
   }