Updating ReadableExpressions and NetStandardPolyfills package references to 1.8.5 and 0.2.1 respectively

Author: SteveWilkes

AgileMapper.UnitTests.Polyfills/AgileMapper.UnitTests.Polyfills.csproj

@@ -20,7 +20,7 @@
   <ItemGroup Condition=" '$(TargetFramework)' == 'netcoreapp1.1.1' ">
     <ProjectReference Include="..\AgileMapper\AgileMapper.csproj" />
     <PackageReference Include="Shouldly" Version="2.8.2" />
-    <PackageReference Include="AgileObjects.NetStandardPolyfills" Version="0.2.0" />
+    <PackageReference Include="AgileObjects.NetStandardPolyfills" Version="0.2.1" />
   </ItemGroup>
 
   <ItemGroup>

AgileMapper/AgileMapper.csproj

@@ -29,8 +29,8 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="AgileObjects.NetStandardPolyfills" Version="0.2.0" />
-    <PackageReference Include="AgileObjects.ReadableExpressions" Version="1.8.3" />
+    <PackageReference Include="AgileObjects.NetStandardPolyfills" Version="0.2.1" />
+    <PackageReference Include="AgileObjects.ReadableExpressions" Version="1.8.5" />
   </ItemGroup>
 
   <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard1.0' ">