Update node version from 8 to 10 and dependencies (#39)

Author: MateoKruk

functions/package-lock.json

@@ -11,7 +11,7 @@
     "setup-firebase": "node setupProject.js"
   },
   "engines": {
-    "node": "8"
+    "node": "10"
   },
   "dependencies": {
     "@google-cloud/storage": "^4.7.0",

functions/package.json

@@ -2,7 +2,6 @@
 /* eslint-disable global-require */
 const admin = require('firebase-admin');
 const readline = require('readline');
-const uuid = require('uuid/v4');
 
 const rl = readline.createInterface({
   input: process.stdin,