Node 8 (WIP) (#9946)

* start upgrade to node 8

* upgrade travis

* improve travis

* Remove bluebird, babel (except for modules) from server (WIP) (#9947)

* remove bluebird, babel from server (except for modules)

* fixes

* fix path

* fix path

* fix export

* fix export

* fix test

* fix tests

* remove plugin for transform-object-rest-spread since it is supported in node8

* babel: correct syntax rest spread

* remove bluebird

* update migrations archive readme

* fix package-lock.json

* fix typo

* add package-loc

website/server/controllers/top-level/dataexport.js

@@ -11,7 +11,6 @@ import js2xml from 'js2xmlparser';
 import Pageres from 'pageres';
 import nconf from 'nconf';
 import got from 'got';
-import Bluebird from 'bluebird';
 import md from 'habitica-markdown';
 import {
   S3,
@@ -244,7 +243,7 @@ api.exportUserAvatarPng = {
       Body: stream,
     });
 
-    let s3res = await new Bluebird((resolve, reject) => {
+    let s3res = await new Promise((resolve, reject) => {
       s3upload.send((err, s3uploadRes) => {
         if (err) {
           reject(err);