chore(package): update dependencies

Author: greenkeeper[bot]

package.json

@@ -26,19 +26,19 @@
   "homepage": "https://github.com/ember-fastboot/fastboot-app-server#readme",
   "dependencies": {
     "basic-auth": "^1.0.3",
-    "chalk": "^1.1.3",
+    "chalk": "^2.0.1",
     "compression": "^1.6.2",
     "express": "^4.13.3",
     "fastboot": "^1.0.0-rc.0",
     "fastboot-express-middleware": "^1.0.0-rc.4",
-    "fs-promise": "^0.3.1"
+    "fs-promise": "^2.0.3"
   },
   "devDependencies": {
     "babel-core": "^6.10.4",
     "babel-preset-es2015": "^6.9.0",
-    "chai": "^3.5.0",
+    "chai": "^4.1.0",
     "ember-cli": "^2.6.2",
-    "mocha": "^2.4.5",
-    "request-promise": "^3.0.0"
+    "mocha": "^3.4.2",
+    "request-promise": "^4.2.1"
   }
 }