v5.7.0
- Ruby 2.6 support - We have tested the agent with the official release of Ruby 2.6.0 made on December 25, 2018. 
- Support for loading Sequel core standalone - The agent will now enable Sequel instrumentation when an application loads Sequel's core standalone, which does not use the - Sequel:Modelclass. Thanks to Vasily Kolesnikov for the contribution!
- Grape 1.2 support - With agent versions 5.6 and earlier, Grape 1.2 apps reported their transactions under the name - Proc#callinstead of the name of the API endpoint. Starting with agent version 5.7, all existing versions of Grape will report the correct transaction name. Thanks to Masato Ohba for the contribution!