fix(): pin to right typescript versions and drop OpaqueToken

Author: jamesdaniels

package.json

@@ -73,7 +73,7 @@
     "systemjs": "^0.19.16",
     "systemjs-builder": "^0.15.7",
     "traceur": "0.0.96",
-    "typescript": "^2.4.0"
+    "typescript": ">=2.4.2 <2.5"
   },
   "typings": "index.d.ts"
 }

src/core/angularfire2.ts

@@ -1,6 +1,6 @@
 import * as firebase from 'firebase/app';
 import { FirebaseAppConfigToken, FirebaseApp, _firebaseAppFactory } from './firebase.app.module';
-import { Injectable, InjectionToken, OpaqueToken, NgModule } from '@angular/core';
+import { Injectable, InjectionToken, NgModule } from '@angular/core';
 import { Subscription } from 'rxjs/Subscription';
 import { Scheduler } from 'rxjs/Scheduler';
 import { queue } from 'rxjs/scheduler/queue';

yarn.lock

@@ -3887,9 +3887,9 @@ [email protected]:
   version "1.8.10"
   resolved "https://registry.yarnpkg.com/typescript/-/typescript-1.8.10.tgz#b475d6e0dff0bf50f296e5ca6ef9fbb5c7320f1e"
 
-typescript@^2.4.0:
-  version "2.6.1"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.6.1.tgz#ef39cdea27abac0b500242d6726ab90e0c846631"
+"typescript@>=2.4.2 <2.5":
+  version "2.4.2"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.4.2.tgz#f8395f85d459276067c988aa41837a8f82870844"
 
 uglify-js@^2.6:
   version "2.8.29"