Update metapackage versions

Author: clairernovotny

Source/MSBuild.Sdk.Extras/DefaultItems/ImplicitPackages.targets

@@ -8,15 +8,15 @@
     Package Version property for Implicit Packages included in the props file
   -->
   <PropertyGroup Condition="'$(ExtrasUwpMetaPackageVersion)' == ''">
-    <ExtrasUwpMetaPackageVersion>6.2.11</ExtrasUwpMetaPackageVersion>
+    <ExtrasUwpMetaPackageVersion>6.2.12</ExtrasUwpMetaPackageVersion>
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(ExtrasTizenMetaPackageVersion)' == ''">
     <ExtrasTizenMetaPackageVersion>8.0.0.15631</ExtrasTizenMetaPackageVersion>
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(ExtrasNetfxMetaPackageVersion)' == ''">
-    <ExtrasNetfxMetaPackageVersion>1.0.0</ExtrasNetfxMetaPackageVersion>
+    <ExtrasNetfxMetaPackageVersion>1.0.2</ExtrasNetfxMetaPackageVersion>
   </PropertyGroup>  
 
   <PropertyGroup>
@@ -36,4 +36,4 @@
     <PackageReference Include="Microsoft.NETFramework.ReferenceAssemblies" Version="$(ExtrasNetfxMetaPackageVersion)" PrivateAssets="All" IsImplicitlyDefined="true"/>    
   </ItemGroup>  
 
-</Project>
+</Project>