chore: bump deps and fix deprecations

[robertsLando]

@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