Update rxjs

Author: lrowe

package.json

@@ -15,7 +15,7 @@
   "dependencies": {
     "falcor-path-syntax": "0.2.4",
     "falcor-path-utils": "~0.5.0",
-    "rxjs": "5.0.3",
+    "rxjs": "~5.1.1",
     "symbol-observable": "^1.0.4"
   },
   "devDependencies": {