* Bump to SDK 7.0 and related updates
* More net 7 updates
* Install SDK 2.0 for ESRP
* Fix typo
* Address comment and update integration test script
* Disable new warnings from SDK update
* adding network file validator contract
* updating to dotnet 5
* reverting change in pipeline
* updating target framework to 5.0
* updating srgen and using target framework var
* reverting srgen back to 3.1
* Adding dotnet 3.1 to build
* Fixing task def
* removing global json
* updating other 3.1 refs to 5.0
* removing netcore folder from build.cake
* Moving and renaming dotnet 3.1 task
* Update form .NET Core 2.2 to .NET Core 3.1
- Global variable for projects
- Change TFMs from netcoreapp2.2 to netcoreapp3.1
- Update global.json
- Update build.json
- Remove direct framework cake TestCore task
- Update travis dotnet version
- Update azure pipline file
- Update vscode launch.json
* Add Central Package Management
* Fix xUnit Breaking Change for MemberData type
* Fix xUnit breaking change for duplicate test method name
* Fix Rang/Index type conflict with System.Rang/Index
* Update vscode tasks.json
* Change serviceHostExecutable path in ServiceTestDriver.cs
* Downgrade SDK version (https://github.com/appveyor/ci/issues/3440)
- Appveyor hasn't installed latest SDK therefore I downgrade it until they install it.
* Dump Microsoft.SqlServer.DACFx
