Remove `axios` dependency transitioning to VanillaJS(ES6) with `Promise`

[Jbee]

This issue is...

• Bug report
• Feature request
• Documentation issue or request
• Support request

Current behavior

Expected behavior

to improve usability without dependencies

Please tell us about your environment

npm version: X.Y.Z

Browser:
- [ ] Chrome (desktop) version XX
- [ ] Chrome (Android) version XX
- [ ] Chrome (iOS) version XX
- [ ] Firefox version XX
- [ ] Safari (desktop) version XX
- [ ] Safari (iOS) version XX
- [ ] IE version XX
- [ ] Edge version XX
 
For Tooling issues:
- Node version: XX 
- Platform: 

Others: