build: allow Angular 4 (#99)

Author: filipesilva

package.json

@@ -28,8 +28,8 @@
   },
   "homepage": "https://github.com/angular/in-memory-web-api#readme",
   "peerDependencies": {
-    "@angular/core": "^2.0.0",
-    "@angular/http": "^2.0.0",
+    "@angular/core": ">=2.0.0 <5.0.0 || >=4.0.0-beta <5.0.0",
+    "@angular/http": ">=2.0.0 <5.0.0 || >=4.0.0-beta <5.0.0",
     "rxjs": "^5.0.1"
   },
   "devDependencies": {
@@ -40,7 +40,7 @@
     "@angular/http": "~2.4.0",
     "@angular/platform-browser": "~2.4.0",
     "@angular/platform-server": "~2.4.0",
-    "@types/jasmine": "^2.5.36",
+    "@types/jasmine": "2.5.36",
     "@types/node": "^6.0.46",
     "canonical-path": "0.0.2",
     "concurrently": "^3.0.0",