set package id explicitly

Author: popcron

source/Shaders.Systems.csproj

@@ -15,6 +15,7 @@
     <TreatWarningsAsErrors>True</TreatWarningsAsErrors>
     <IncludeBuildOutput>false</IncludeBuildOutput>
     <OutDir>bin/$(TargetFramework)/$(Configuration)</OutDir>
+    <PackageId>SimulationTree.Shaders.Systems</PackageId>
   </PropertyGroup>
 
   <ItemGroup>

tests/Shaders.Systems.Tests.csproj

@@ -7,6 +7,7 @@
     <Nullable>enable</Nullable>
     <IsPackable>false</IsPackable>
     <IsTestProject>true</IsTestProject>
+    <PackageId>SimulationTree.Shaders.Systems.Tests</PackageId>
   </PropertyGroup>
 
   <ItemGroup>