U-sql referenced assembly built with 4.5.1? Whereas documented 4.5 is needed

It's documented that U-SQL uses .net 4.5

https://docs.microsoft.com/en-us/azure/data-lake-analytics/data-lake-analytics-u-sql-programmability-guide#use-assembly-versioning

So to ensure that our own custom assemblies are built to that runtime.

When creating a "Class Library (For U-SQL Application)" via Azure Data Lake And Stream Analytics Tools version 2.3.4000.3 it's set to build to .net 4.5 which is fine, but it appears to be referencing e.g. Microsoft.Analytics.Interfaces which is built to 4.5.2 and fails to load.

I'm using Visual Studio 15.8.0, it feels like because it's from a general visual studio folder that it's been upgraded unbeknown to u-sql.

> Severity Code Description Project File Line Suppression State Warning The primary reference "Microsoft.Analytics.Interfaces" could not be resolved because it was built against the ".NETFramework,Version=v4.5.2" framework. This is a higher version than the currently targeted framework ".NETFramework,Version=v4.5". MYUDFNAMEHERE C:\Program Files (x86)\Microsoft Visual Studio\2017\Enterprise\MSBuild\15.0\Bin\Microsoft.Common.CurrentVersion.targets 2110

(Originally posted here, but cross posting in case it's a bug / edge case with recent visual studio updates https://stackoverflow.com/questions/51878732/u-sql-referenced-assembly-built-with-4-5-1-whereas-documented-4-5-is-needed)