Update npm publishing configuration

Author: natemcmaster

build/publish/Publish.csproj

@@ -127,15 +127,11 @@
           Command="npm config set "$(AuthTokenSetting)" $(PublishMyGetFeedKey)"
           StandardOutputImportance="Normal" />
 
-    <!-- When you UseCommandProcessor FileName is ignored -->
-    <Run Condition=" @(NpmPackageToPublish->Count()) != 0 "
-         FileName="cmd"
-         Arguments="npm;publish;--registry;$(PublishMyGetNpmRegistryUrl);%(NpmPackageToPublish.Identity)"
-         MaxRetries="5"
-         UseCommandProcessor="true"
-         ContinueOnError="true">
+    <Exec Condition=" @(NpmPackageToPublish->Count()) != 0 "
+          Command="npm publish --registry '$(PublishMyGetNpmRegistryUrl)' '%(NpmPackageToPublish.Identity)'"
+          ContinueOnError="true">
       <Output TaskParameter="ExitCode" ItemName="_NpmExitCodes" />
-    </Run>
+    </Exec>
 
     <Exec Condition=" @(NpmPackageToPublish->Count()) != 0 "
           Command="npm config delete $(AuthTokenSetting)"