refactor: upgrade to webpack-defaults

[joshwiens]

What kind of change does this PR introduce? (check one with "x")

[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[x] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Other... Please describe:

• Updates loader-utils to version 1.1.0
• Drops object-assign pollyfill
• Adds contrib standard Babel configuration
• Adds contrib standard Eslint configuration
• Refactors to utilize ES6+ JavaScript features
• Adds a commonjs proxy for "main": "dist/cjs.js" to account for ES module .default

Does this PR introduce a breaking change? (check one with "x")

[x] Yes
[ ] No

If this PR contains a breaking change, please describe the impact and migration path for existing applications: ...

• As a part of the webpack-defaults upgrade a NodeJS version of 4.3 or newer is enforced.
  "engines": { "node": ">= 4.3 < 5.0.0 || >= 5.10" },

• The loader-utils package has also been updated to ^1.1.0 which also requires NodeJS > 4.3

Other information:

Merge & release as a semver: MAJOR with the proper breaking change notations in the squash commits footer.

Publish as 3.0.0 on the beta dist-tag

Closes #53

[joshwiens]

Note: Before this merges, I need to do a quick sanity check in a few consuming projects.

[bebraw]

Looks ok. To play it safe, do a beta so we get some initial feedback. Then go stable if nothing appears. 👍

[joshwiens]

@bebraw - Last line in the initial pull request comment :)

[bebraw]

Ah, ok. Netcraft confirms it. 👍

[joshwiens]

This bricks @angular/cli in it's current state and will require an upgrade path and/or a pull request to the cli as a part of this going from beta to latest on the dist-tag.

[DanielaValero]

Hello @d3viant0ne

Is there anything I can pick up here to help getting the PR finalised?

[joshwiens]

Not at the moment. There was a hold on the defaults upgrades while we figured out the best way to setup the Jest suites to execute tests through webpack without sacrificing Jest features

[DanielaValero]

Sure, I'll remain close, in case there is even a dot I can write to help with :)

[joshwiens]

@filipesilva - Friendly heads up, there is a semver Major coming for istanbul-instrumenter-loader. No changes in functionality or the loaders API.

It applies webpack-defaults which in turn enforces the standard webpack versions for engines with the bottom limit being NodeJS 4.3. So Major for the loader, no change for @angular/cli.

I'll push it out on a beta dist-tag and run it through it's paces. Once we are satisfied with it, i'll ping you again incase you want to run it in dev before 3.0.0 goes to @latest

[michael-ciniawsky]

Needs an update with latest webpack-defaults :D, still using yarn && old npm scripts

[filipesilva]

@d3viant0ne thanks for the heads up! I can test the new version in Angular CLI once there's a npm tag up that I can use.

[joshwiens]

@michael-ciniawsky - Yeah, holding off on this until we decide on the npm changes & push those out in defaults.