Add license tag to project file

Update package versions

src/Directory.Build.props

@@ -10,10 +10,10 @@
 
   <ItemGroup>
     <PackageReference Include="Azure.Identity" Version="1.3.0"/>
-    <PackageReference Include="System.Text.Json" Version="5.0.0" />
-    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="3.8.0" />
+    <PackageReference Include="System.Text.Json" Version="5.0.1" />
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="3.9.0" />
     <PackageReference Include="Microsoft.Azure.AutoRest.CSharp" Version="3.0.0-beta.20210211.2" />
-    <PackageReference Include="Azure.Core" Version="1.7.0"/>
+    <PackageReference Include="Azure.Core" Version="1.10.0"/>
   </ItemGroup>
 
 </Project>

src/Microsoft.Marketplace.csproj

@@ -5,6 +5,10 @@
     <LangVersion>latest</LangVersion>
   </PropertyGroup>
 
+  <PropertyGroup>
+    <PackageLicenseExpression>MIT</PackageLicenseExpression>
+  </PropertyGroup>
+
 
   <ItemGroup>
     <PackageReference Include="StyleCop.Analyzers" Version="1.2.0-beta.312">