Updating to v5.0 (#358)

Add AnnotatedReferenceAssemblyVersion to fix build (#352)

* Add AnnotatedReferenceAssemblyVersion to fix build

* Use version 5.0.0 instead of 3.1.0

* Use version 8.0.0 instead of 3.1.0

* Add TunnelVision only for .netstandard2.0

Update GuardClauses.csproj

Update to version 4.4

4.3 release

Update GuardClauses.csproj (#308)

Add PackageReadmeFile to csproj

Update proj file for 4.1.0

Rev to v4.0.0 (#176)

Rev to v4.0.0 (#176)