Add packages for all supported platforms.

Author: hazzik

src/NHibernate.Test/NHibernate.Test.csproj

@@ -81,7 +81,9 @@
     <PackageReference Include="System.Data.SqlClient" Version="4.8.2" />
     <PackageReference Include="System.Data.OracleClient" Version="1.0.8" />
     <PackageReference Include="Oracle.ManagedDataAccess.Core" Version="2.19.120" />
-    <PackageReference Include="IBM.Data.DB2.Core-lnx" Version="2.2.0.100" />
+    <PackageReference Include="IBM.Data.DB2.Core" Version="2.2.0.100" Condition="$([MSBuild]::IsOSPlatform('Windows'))" />
+    <PackageReference Include="IBM.Data.DB2.Core-lnx" Version="2.2.0.100" Condition="$([MSBuild]::IsOSPlatform('Linux'))" />
+    <PackageReference Include="IBM.Data.DB2.Core-osx" Version="2.0.0.100" Condition="$([MSBuild]::IsOSPlatform('OSX'))" />
     <PackageReference Include="System.Data.Odbc" Version="4.7.0" />
     <PackageReference Include="System.Net.NameResolution" Version="4.3.0" />
     <PackageReference Include="NUnitLite" Version="3.13.2" />