develop
Cleaned up build targets for MongoDB using the v3.1 client, fixed warnings
Replace Array.Empty with collection expression
Added net10.0 build target
Integration of all external packages into MassTransit, split out into Abstractions, Middleware, and the core MassTransit assembly.
Fixed #3344 - added internal code analysis types for NETSTANDARD2.0 and NET462 builds to allow proper nullable output types for analyzer
Quartz configuration using Quartz.NET Dependency Injection, must cleaner, will obsolete the previous configuration methods.