Adding angular4 as a peer dependency.

[vangorra]

• What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)
  Adds support for angular ^4.0.0

[ghost]

ng2-dnd is working as expected on my angular 4 project

[vangorra]

It will work but npm will warn about a peer dependency missing. If you use npm shrinkwrap, it won't work at all without the peer dependency being set.

[morocarlo]

can you merge and release this branch on npm?

[akserg]

Today evening.

[akserg]

Hi @vangorra

I made merge via command line into the new repo and run npm install. The installed version of Angular was 2.4.10, so the bundle's build was based on it.

Can you explain how can I use version ^4.0.0 from the given semver range in "@angular/core": "^2.4.4 || ^4.0.0"?
I have only one idea - update all @angular/... dependencies to version ^4.0.0 such that "@angular/core": "^4.0.0" and etc.

[vangorra]

@akserg I'm not entirely sure what error you are mentioning. The benefit to this pull request comes when your project makes use of npm shrinkwrap. Shrinkwrapping locks dependency versions in place, so your build and app will behave predictably even when a dependency introduces a bug in a later minor version.

I have setup some examples that demonstrate how this change will help an angular 4 project.
https://github.com/vangorra/ng2-dnd-examples

The examples demonstrate the following:

• ng2 - angular 2 application with ng2-dnd where npm shrinkwrap has been used successfully.
• ng4-with-errors - angular 4 application with ng2-dnd where npm shrinkwrap cannot be used as there are errors about peer dependencies.
• ng4 - angular 4 application with with ng2-dnd (and this pull request) where npm shrinkwrap has been used successfully.

[trik]

since the development of this module is stuck at 30th of january and i really needed it for my ng4 project, i published an update on my fork https://github.com/gnucoop/ng2-dnd (ng4 update and es5/es2015/umd bundles generation). the modified version is available on npm as ngx-dnd. if anyone interested, feel free to contribute

[akserg]

Done.