Merge from vuejs-templates/webpack#develop preserving PWA configuration

[NicoCevallos]

Big merge from vuejs-templates/webpack#develop
Main changes:

• Switch to webpack-dev-server. Same intention as the PR 118 that applies the webpack template's PR 975. It adds new dependencies and remove unused dependencies
  • Removed
    • connect-history-api-fallback used in template/build/dev-server.js
    • eventsource-polyfill used in template/build/dev-client.js
    • express used in template/build/dev-server.js
    • http-proxy-middleware used in template/build/dev-server.js
    • opn used in template/build/dev-server.js
    • webpack-dev-middleware used in template/build/dev-server.js
    • webpack-hot-middleware used in template/build/dev-client.js and template/build/dev-server.js
  • Added
    • friendly-errors-webpack-plugin
    • html-webpack-plugin
    • node-notifier
    • portfinder
    • webpack-bundle-analyzer
    • webpack-dev-server
• Merge documentation fixing some typos but preserving the customization to PWA
• Merge template initialization adding options to use jest and yarn
• Remove fixes to add , or ; for airbnb ESLint preset, due webpack template runs lint --fix if the user select to intall dependencies using npm or yarn
• Merge package.json to:
  • add eslint-plugin-vue to lint HTML Templates
  • Add postcss modules
  • Remove cssnano it is not present on webpack template, but as it's a dependency of optimize-css-assets-webpack-plugin and css-loader, so it is not required on the package.json
• Sort the dependencies alphabetically to ease next merges/pull requests

Thanks in advance for any review and comment.

[anubhav7495]

@NicoCevallos Thanks for the contribution. Can you please break this into multiple PR's according to the way they were merged in Webpack template. Currently it is too big to actually review.

Thanks.

[NicoCevallos]

@anubhav7495 I simply compared both repos and move the changes, preserving anything related to PWA in webpack.base.conf.js and documentation, due to it looks like a lot of merged PR to Webpack template was not merged to this one.
Do you have a way to check the PRs merged to Webpack template that needs to be merged with this one?
Another option is to do the same but, progressively.

Let me know what do you think.

[michalsnik]

@anubhav7495 any news here? It would be really nice to have jest setup in this template too

[cristianl]

@michalsnik As the next version of vue-cli moves to a plugin-based architecture instead of templates, I don't think the PWA template will get new features. With the 3.0 beta coming very soon, the final release is unlikely to take long.

[michalsnik]

I know @cristianl, but it will take some time for the new cli to be production ready. And this template already is, so it would be faster to merge those changes anyway.

[cristianl]

@michalsnik Oh, I see – sorry for the 'splaining.

[niutech]

Missing //

[NicoCevallos]

Hello there!

I should close this PR, right? I guess nobody will find those changes useful with the vue-cli 3.
What do you think @anubhav7495?