feat: bump up Angular dependency to 4.0.3

[pkozlowski-opensource]

Closes #1337
Closes #1415
Closes #1433
Closes #1439

BREAKING CHANGE:

ng-bootstrap requires a minimal version of Angular 4.0.3

[pkozlowski-opensource]

Let's wait a day or two to see if people don't report problems with the freshly released 1.0.0-alpha.24 and if not - let's get this one in!

[Danteisabck]

Hello @pkozlowski-opensource ,i'm using angular 4.0.3, i update ng-bootstrap to 1.0.0-alpha.24, but in build aot i have a same problem
Template parse warnings:
The element is deprecated. Use instead ("

[WARNING ->]<template ngFor let-panel [ngForOf]="panels"><div role="tab" id="{{panel.id}}-header""): ng:///D:/widget/web-widget/node_modules/@ng-bootstrap/ngbootstrap/accordion/accordion.d.ts.NgbAccordion.html@2:4

[pkozlowski-opensource]

@Danteisabck of course, since this PR wasn't merged / released yet.... IT will be part of alpha.25. For now you can safely ignore the warning.

[Danteisabck]

@pkozlowski-opensource 1. can your tell when you are planning to merge this PR ?
2. And i have a silly question, if I use build aot i get this warnings but if i use build jit i don't get these warnings, i try to use carousel, can it be a problem with tsconfig aot ?