Heroku

Add a new channel type than support line messenger

ref: https://developers.line.biz/en/services/messaging-api/

This demo is great and help us a lot.

As now JWT ( JSON Web Token ) becomes an important way of authentication. What bout adding JWT authentication to this demo? Or we use JWT authentication instead of traditional session-cookie way.

Let's make this demo more powerful. : )

Is your feature request related to a problem?

It is way too easy to navigate away from the Feature Flags edit page without pressing "Save", losing all changes. I have done it probably a dozen times.

Describe the solution you'd like

Longer term, any changes to filter criteria should auto-save. But because this will probably require extra testing and implementation time, for now a bro

Describe the bug
The button to toggle the chat widget doesn't have discernible text.

To Reproduce
Steps to reproduce the behavior:

1. Go to a page with the Papercups chat widget installed.
2. Check accessibility with axe DevTools
3. See Buttons must have discernible text issue

Context

• This is part of release-1.5 #148
• MEDIUM priority task

Tasks

• Remove dependency bcrypt-nodejs in package.json
• Add dependency bcrypt in package.json
• Migrate file app/data/user-dao.js to bcrypt
• Validate the instalation with the local test
• Add and submit the chang