Auto merge of #511 - saneyuki:tsc, r=saneyuki

Re-enable tsc's noImplicitReturns option

Fix #503

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package.json

@@ -88,7 +88,7 @@
     "mocha": "^2.3.4",
     "tsd": "^0.6.5",
     "tslint": "3.1.0-dev.1",
-    "typescript": "1.8.0-dev.20151128",
+    "typescript": "1.8.0-dev.20151201",
     "vinyl-source-stream": "^1.1.0"
   }
 }

tsconfig.json

@@ -5,7 +5,7 @@
         "module": "es2015",
         "moduleResolution": "node",
         "noImplicitAny": true,
-        "noImplicitReturns": false, // FIXME: #503 we'd like to enable this option again.
+        "noImplicitReturns": true,
         "outDir": "./dist/client/__obj/",
         "pretty": true,
         "preserveConstEnums": true,