Add package descriptions.

Ix.NET/Source/System.Linq.Async.Queryable/System.Linq.Async.Queryable.csproj

@@ -2,6 +2,9 @@
 
   <PropertyGroup>
     <TargetFrameworks>net461;netstandard2.0;netstandard2.1;netcoreapp3.0</TargetFrameworks>
+    <Title>System.Linq.Async.Queryable</Title>
+    <PackageTags>LINQ;async;streams;query;provider</PackageTags>
+    <Description>Provides support for Language-Integrated Query (LINQ) over IAsyncQueryable&lt;T&gt; sequences with query providers.</Description>
   </PropertyGroup>
 
   <ItemGroup>

Ix.NET/Source/System.Linq.Async/System.Linq.Async.csproj

@@ -2,6 +2,9 @@
 
   <PropertyGroup>
     <TargetFrameworks>net461;netstandard2.0;netstandard2.1;netcoreapp3.0</TargetFrameworks>
+    <Title>System.Linq.Async</Title>    
+    <PackageTags>LINQ;async;streams;query</PackageTags>
+    <Description>Provides support for Language-Integrated Query (LINQ) over IAsyncEnumerable&lt;T&gt; sequences.</Description>  
   </PropertyGroup>
 
   <ItemGroup>