New fsharp script task version

[TomMalow]

Description

Adds a new version of Fsharp Script task that is able to handle new Azure Dev Ops agent location. The new version is gives the option to use fsi.exe found in

• Microsoft SDK - Same function as the original task
• Visual Studio Enterprise 2017 - Azure DevOps V2017 Agent has this fsi.exe has default
• Custom Path

This update also updates the tfx-cli to version 0.6 as it seems to be necessary for uploading extensions to Azure DevOps. Extension manifest for Azure DevOps task has replaced the category "Build and release" with "Azure Pipelines"

This pull request also adds a few unit test for the new task. However, these are not added to the build script.

• fixes #29

TODO

• [] Verify that release docs and new task has the correct version.
• [] Verify that the new manifest is still usable for existing tasks.

[isaacabraham]

Thanks for this!!

[TomMalow]

Do we have a ETA on when this is released in a new version?

[TomMalow]

Oh didn't see the discussion in issue #29 that you are already working hard on releasing the new feature. Looking forward to it.