Attempt to fix travis issue.

Author: langley-agm

package.json

@@ -82,17 +82,16 @@
     "rxjs": "5.2.0",
     "systemjs": "0.19.41",
     "tslint": "4.5.1",
-    "typescript": "2.2.1",
     "typings": "^2.0.0",
     "uglify-js": "^2.6.2",
     "zone.js": "^0.7.4"
   },
   "peerDependencies": {
-    "@angular/common": "4.0.2",
-    "@angular/compiler": "4.0.2",
-    "@angular/core": "4.0.2",
-    "@angular/platform-browser": "4.0.2",
-    "@angular/platform-browser-dynamic": "2.4.9"
+    "@angular/common": "^4.0.2",
+    "@angular/compiler": "^4.0.2",
+    "@angular/core": "^4.0.2",
+    "@angular/platform-browser": "^4.0.2",
+    "@angular/platform-browser-dynamic": "^4.0.2"
   },
   "main": "./dist/cjs/core.js",
   "module": "./dist/umd/core.js"