sparse_simulate not finding magic command

[sam-jaques]

Describe the bug
The sparse simulator is not accessible from Jupyter notebooks or python.

To Reproduce
Steps to reproduce the behavior:
In Jupyter:

%%qsharp

operation nop(): Unit {}

nop.simulate()
nop.simulate_sparse()

This results in an error: "No such magic command %simulate_sparse".

If I replace simulate_sparse with simulate_dense (which is not a simulator), I get a different error: "'QSharpCallable' object has no attribute 'simulate_dense'".

System information

• qsharp package Version: 0.27.244707
• iqsharp: 0.20.2110171573
• Jupyter Core: 1.5.0.0
• .NET Runtime: .NETCoreApp,Version=v3.1

dotnet 6.0.300 is installed; I'm not sure if iqsharp needs to use it, and if so, how to do so.