Push VSIX version number to 1.7.2

Tests: Set Roslyn language version to latest

Update to -beta4 NuGet, fix Workbook errors

VersionName = beta3

Final Beta 2 updates

Fix icsharpcode#938: add support for I4->I stack type adjustments.

With this fix we still only propagate type information along forward branches, so some of the issues in icsharpcode#901 remain.

Update nuspec dependencies

Fix missing cast in signed uint<int comparison.

Fix icsharpcode#855 - ArgumentOutOfRangeException in TransformCollect…

…ionAndObjectInitializers.DoTransform

bump version to 2.4