chore(package): update dependencies

Author: greenkeeper[bot]

package.json

@@ -26,21 +26,21 @@
   },
   "homepage": "https://github.com/ember-fastboot/fastboot#readme",
   "dependencies": {
-    "chalk": "^0.5.1",
-    "cookie": "^0.2.3",
+    "chalk": "^2.0.1",
+    "cookie": "^0.3.1",
     "debug": "^2.1.0",
-    "exists-sync": "0.0.3",
+    "exists-sync": "0.0.4",
     "najax": "^1.0.2",
     "rsvp": "^3.0.16",
     "simple-dom": "^0.3.0",
     "source-map-support": "^0.4.0"
   },
   "devDependencies": {
-    "chai": "^3.5.0",
-    "chai-as-promised": "^5.2.0",
+    "chai": "^4.1.0",
+    "chai-as-promised": "^7.1.1",
     "express": "^4.13.3",
-    "fs-promise": "^0.5.0",
-    "mocha": "^2.4.5",
+    "fs-promise": "^2.0.3",
+    "mocha": "^3.4.2",
     "mocha-jshint": "^2.3.1",
     "rimraf": "^2.5.4",
     "temp": "^0.8.3"