Power-Fx

GA build on Nuget.org: https://www.nuget.org/packages/Microsoft.PowerFx.Core/1.2.0

GA build on Nuget.org: https://www.nuget.org/packages/Microsoft.PowerFx.Core/1.1.0

Release notes; https://github.com/microsoft/Power-Fx/blob/main/releasenotes/releasenotes-1.1.0.md

Release 0.2.6-preview

Many improvements, including:

1. Updates namespaces (see #361) - this is a breaking change from 0.2.1-preview.
2. More control over configuration and adding custom functions and optionsets.
3. publicly expose the syntax tree from the parser.
4. More functions implemented in interpreter.
5. Better config story for adding custom functions
6. Better host marshalling, including add virtual...