Lower dep versions to support msvc 17.0

Author: Predelnik

RemoveTrailingWhitespaces/RemoveTrailingWhitespaces.csproj

@@ -180,10 +180,10 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.VisualStudio.ComponentModelHost">
-      <Version>17.1.386</Version>
+      <Version>17.0.487</Version>
     </PackageReference>
     <PackageReference Include="Microsoft.VisualStudio.Editor">
-      <Version>17.1.386</Version>
+      <Version>17.0.491</Version>
     </PackageReference>
   </ItemGroup>
   <PropertyGroup>

RemoveTrailingWhitespaces/RemoveTrailingWhitespacesPackage.cs

@@ -17,6 +17,7 @@
 using System.Collections.Generic;
 
 using Task = System.Threading.Tasks.Task;
+using Microsoft;
 
 namespace Predelnik.RemoveTrailingWhitespaces
 {
@@ -130,7 +131,9 @@ public RemoveTrailingWhitespacesPackage()
         protected override async Task InitializeAsync(System.Threading.CancellationToken cancellationToken, IProgress<ServiceProgressData> progress)
         {
             dte = await GetServiceAsync(typeof(EnvDTE.DTE)) as EnvDTE.DTE;
+            Assumes.Present(dte);
             rdt = await GetServiceAsync(typeof(SVsRunningDocumentTable)) as IVsRunningDocumentTable;
+            Assumes.Present(rdt);
             componentModel = GetGlobalService(typeof(SComponentModel)) as IComponentModel;
             await this.JoinableTaskFactory.SwitchToMainThreadAsync(cancellationToken);
             InitializePackage();

RemoveTrailingWhitespaces/source.extension.vsixmanifest

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <PackageManifest Version="2.0.0" xmlns="http://schemas.microsoft.com/developer/vsx-schema/2011" xmlns:d="http://schemas.microsoft.com/developer/vsx-schema-design/2011">
     <Metadata>
-        <Identity Id="22c372db-a793-4294-9fdb-83228aaf2a23" Version="1.04" Language="en-US" Publisher="Predelnik" />
+        <Identity Id="22c372db-a793-4294-9fdb-83228aaf2a23" Version="1.05" Language="en-US" Publisher="Predelnik" />
         <DisplayName>RemoveTrailingWhitespaces</DisplayName>
         <Description>Trailing whitespace removal tool. Removes either manually or on file save.</Description>
         <License>LICENSE.txt</License>