Revert "feat(): Migration to Angular 2.3.4"

This reverts commit 6bb0619.

package.json

@@ -32,17 +32,17 @@
   "typings": "index.d.ts",
   "homepage": "https://github.com/akserg/ng2-slim-loading-bar",
   "peerDependencies": {
-    "@angular/core": "^2.4.3"
+    "@angular/core": "^2.0.0"
   },
   "devDependencies": {
-    "@angular/common": "^2.4.3",
-    "@angular/compiler": "^2.4.3",
-    "@angular/compiler-cli": "^2.4.3",
-    "@angular/core": "^2.4.3",
-    "@angular/platform-browser": "^2.4.3",
-    "@angular/platform-browser-dynamic": "^2.4.3",
-    "@angular/platform-server": "^2.4.3",
-    "@types/hammerjs": "^2.0.33",
+    "@angular/common": "^2.1.2",
+    "@angular/compiler": "^2.1.2",
+    "@angular/compiler-cli": "^2.1.2",
+    "@angular/core": "^2.1.2",
+    "@angular/platform-browser": "^2.1.2",
+    "@angular/platform-browser-dynamic": "^2.1.2",
+    "@angular/platform-server": "^2.1.2",
+    "@types/hammerjs": "2.0.33",
     "@types/jasmine": "2.5.37",
     "@types/node": "6.0.46",
     "awesome-typescript-loader": "2.2.4",
@@ -54,16 +54,16 @@
     "jasmine-core": "2.5.2",
     "karma": "1.3.0",
     "karma-chrome-launcher": "2.0.0",
-    "karma-coverage": "1.1.1",
     "karma-firefox-launcher": "1.0.0",
+    "karma-coverage": "1.1.1",
     "karma-jasmine": "1.0.2",
     "karma-mocha-reporter": "^2.1.0",
     "karma-remap-coverage": "~0.1.2",
     "karma-sourcemap-loader": "^0.3.7",
     "karma-webpack": "^1.8.0",
     "loader-utils": "~0.2.16",
-    "reflect-metadata": "^0.1.8",
-    "rxjs": "^5.0.1",
+    "reflect-metadata": "0.1.8",
+    "rxjs": "^5.0.0-beta.12",
     "semantic-release": "4.3.5",
     "source-map-loader": "0.1.5",
     "ts-helpers": "1.1.2",