Native Windows builds crash when using Burst 1.4.1

[jsm174]

With PR https://github.com/freezy/VisualPinball.Engine/pull/255 we upgraded the required version of Unity to 2020.2.0.b12.

When building a table such as mm, and making a native Windows build, it will crash immediately after launch.

After researching, I observed the following:

• master, Burst 1.4.1, built in renderer, add mm table, win 10 x64 native build, crashes upon launch
• master, Burst 1.4.1, built in renderer, add mm table, disable burst, win 10 x64 native build, working
• master, Burst 1.4.1, built in renderer, add mm table, remove gates/walls/ramps, win 10 x64 native build, working
• master, Burst 1.3.7, built in renderer, add mm table, win 10 x64 native build, working
• master, Burst 1.4.1, built in renderer, add mm table, osx native build, working

The crashes appear to be related to entities.

FWIW, Entities 0.16.0-preview.21 has a Burst 1.3.7 dependency.