Added double quotes to npm search for allowing one character queries.

Author: Armando Aguirre

Nodejs/Product/Nodejs/NpmUI/NpmWorker.cs

@@ -106,7 +106,7 @@ public async Task<IEnumerable<IPackage>> GetCatalogPackagesAsync(string filterTe
 
             TelemetryHelper.LogSearchNpm();
 
-            var relativeUri = string.Format("/-/v1/search?text={0}", WebUtility.UrlEncode(filterText));
+            var relativeUri = string.Format("/-/v1/search?text=\"{0}\"", WebUtility.UrlEncode(filterText));
             var searchUri = new Uri(defaultRegistryUri, relativeUri);
 
             var request = WebRequest.Create(searchUri);