2.x introduces support for multiple connections. To upgrade you must adjust your configuration file and OAuth urls.
The configuration file has been changed to support multiple connections. It is recommended to overwrite the version from the package so that you are up to date.
The environment variables did not change. This means that if you have a single Magento connection you code will not break.
Note
This step is only required when using OAuth authentication
Reauthorize your Magento integration to create the record in your DB.
The OAuth URL's now require a connection parameter, if you have a single Magento instance the connection value is default by default.
Callback URL: https://example.com/magento/oauth/callback/{connection}
Identity link URL: https://example.com/magento/oauth/identity/{connection}
OAuth keys are now stored in the database by default.
If you prefer to store them on disk you can use the \JustBetter\MagentoClient\OAuth\KeyStore\FileKeyStore or implement your own keystore.
The Magento::fake() method has been altered to use the URL magento instead of http://magento.test. You should replace this in your tests.