Add breaking change description to 18.1.1-beta.2 (#713)

* Add breaking changes to 18.1.1-beta.2

* Update bc description

* Update bc description about angular version

* Fix typo

CHANGELOG.md

@@ -3,6 +3,15 @@
 ### Features
 - Implement ajax on server [#705](https://github.com/DevExpress/devextreme-angular/pull/705)
 
+### Breaking changes
+
+- Since the @angular/http module is deprecated (see https://github.com/angular/angular/pull/18906), DevExtreme-angular now requires adding the following modules to config.ts if you use SystemJS:
+```JavaScript
+'@angular/common/http': 'npm:@angular/common/bundles/common-http.umd.js',
+'tslib': 'npm:tslib/tslib.js',
+```
+- Angular below version 4.3 is not supported anymore.
+
 ## 18.1.1-beta.1 (2018-02-21)
 
 ### Features

package.json

@@ -18,9 +18,9 @@
   "license": "MIT",
   "peerDependencies": {
     "devextreme": "~18.1.1-pre-18064",
-    "@angular/core": ">4.0.0",
-    "@angular/common": ">4.0.0",
-    "@angular/forms": ">4.0.0"
+    "@angular/core": ">4.3.0",
+    "@angular/common": ">4.3.0",
+    "@angular/forms": ">4.3.0"
   },
   "devDependencies": {
     "devextreme": "~18.1.1-pre-18064",