chore(ci): fix circle ci

fix circle ci

Author: danbucholtz

circle.yml

@@ -1,3 +1,8 @@
+machine:
+  node:
+    version: 6.9.5
+  post:
+    - npm install -g npm@3.x.x
 test:
   override:
     - nvm use 6 && npm test

package.json

@@ -92,7 +92,8 @@
     "mock-fs": "3.11.0",
     "rewire": "^2.5.2",
     "rimraf": "2.5.4",
-    "rxjs": "5.0.0-beta.12",
+    "rxjs": "^5.0.1",
+    "sw-toolbox": "3.4.0",
     "tslint-ionic-rules": "0.0.8",
     "typescript": "~2.0.10",
     "zone.js": "^0.7.2"