chore(package): update dependencies

Author: greenkeeper[bot]

package.json

@@ -11,17 +11,17 @@
   },
   "devDependencies": {
     "body-parser": "^1.18.3",
-    "bundlesize": "^0.17.1",
+    "bundlesize": "^0.18.0",
     "chai": "^4.2.0",
     "es6-promise": "^4.2.8",
-    "eslint": "^5.15.3",
+    "eslint": "^6.5.1",
     "express": "^4.16.4",
     "karma": "^4.0.1",
     "karma-chai": "^0.1.0",
-    "karma-chrome-launcher": "^2.2.0",
+    "karma-chrome-launcher": "^3.1.0",
     "karma-mocha": "^1.3.0",
     "karma-sauce-launcher": "^2.0.2",
-    "mocha": "^5.2.0",
+    "mocha": "^6.2.1",
     "nodemon": "^1.19.1",
     "npm-run-all": "^4.1.5",
     "uglify-js": "^3.5.2"