v3.0.6

• Improvement: Automatically bind external accounts newly logged in to local accounts when username match
• Improvement: Simplify configuration for Slack Web API
• Support: Use 'slack-node' instead of '@slack/client'
• Support: Upgrade libs
  • googleapis
  • i18next
  • i18next-express-middleware
  • react-bootstrap-typeahead
  • sass-loader
  • uglifycss