Postbird 0.7.0

On first launch you will probably have to Right Click > Open Postbird.app in order to bypass the Mac OS warning.

• Update to electron 1.7.8
• Update to PostgreSQL 10
• Feature: Auto Connect
• Feature: Show user grants
• Feature: Preserve tab when switch between tables and databases
• Feature: Add red label in list of indexes when index has indisvalid
• Feature: Save query result as CSV
• Better message for "server disconnected" error
• Fix connecting to heroku
• Move from ruby sass to node-sass
• Fix editing users
• Change colors on focus leave
• MIgrate big junk of code from callbacks to async/await
• Add integration tests with spectron