Rails 6 compatibility

Changes

• Rails 6 compatibility
• Ability to specify a name of a User class if it is different from 'User'
• Gem faraday added to dependencies
• A migration is created with a current Rails version of the application
• Ability to fetch not active Token with scope with_not_active

Configuration through application.rb

0.1.5

Update README.md

First stable version

0.1.4

Удалил старые гемы