Release 20.2.0

Feature: Update to Steamworks SDK 1.57 (#553) (Thanks to @TwoPoint-AndyChappell)

Fixed: Fixed usage in Unity's Linux Editor (#479) (Thanks to @tilderain)

Full Changelog: 20.1.0...20.2.0

Unity upgrading notice: If you have a version of Steamworks.NET prior to 20.0.0 in your project, then you must first completely remove Steamworks.NET (aside from your usage of it) before upgrading to this version!

Unity version notice: As of Release 20.0.0 the minimum supported Unity Version is the LTS release "2019.4" due to the package support!

Unity Package Manager URL: https://github.com/rlabrecque/Steamworks.NET.git?path=/com.rlabrecque.steamworks.net#20.2.0

The prebuilt "Standalone" package is for non-Unity projects ONLY.
If you're using Unity you probably want to use the Unity Package Manager URL above rather than the .unitypackage.