How to use specific function host version

[dirthsj]

Due to https://github.com/AzureAD/microsoft-identity-web/issues/1548 I need to target function host version 4.2.0 or later, but core tools are loading version 4.0.1, how do I tell it to use 4.2.0 or later?

[ejizba]

Our current process is to only release core tools with the host after it has rolled out completely in Azure. We are currently in the process of releasing core tools with 4.1.3 of the host, but we have to wait to do 4.2.0

We have a longer term goal to let core tools essentially be a "version manager" for the host, where users can pick their version of the host including "pre release" versions. However, that will be a lot of work and isn't going to happen soon. I believe tracked by https://github.com/Azure/azure-functions-core-tools/issues/2122