chore(package): update dependencies

Author: greenkeeper[bot]

package.json

@@ -28,16 +28,16 @@
   "devDependencies": {
     "babel-core": "^6.11.4",
     "babel-preset-es2015": "^6.9.0",
-    "chai": "^3.5.0",
-    "chai-as-promised": "^5.3.0",
+    "chai": "^4.1.0",
+    "chai-as-promised": "^7.1.1",
     "ember-cli": "^2.7.0",
     "express": "^4.13.4",
-    "mocha": "^2.4.5",
+    "mocha": "^3.4.2",
     "mocha-jshint": "^2.3.1",
-    "request-promise": "^3.0.0"
+    "request-promise": "^4.2.1"
   },
   "dependencies": {
-    "chalk": "^1.1.3",
+    "chalk": "^2.0.1",
     "fastboot": "^1.0.0-rc.5"
   }
 }