Stop using some -alpha packages of interop NuGet packages

There are real versions of these packages now, so we can stop using
-alpha versions. Some other packages were upgraded to avoid package
downgrade concerns.

build/Targets/Packages.props

@@ -12,7 +12,7 @@
 
     <BasicUndoVersion>0.9.3</BasicUndoVersion>
     <CommandLineParserVersion>2.0.273-beta</CommandLineParserVersion>
-    <EnvDTEVersion>8.0.1</EnvDTEVersion>
+    <EnvDTEVersion>8.0.2</EnvDTEVersion>
     <EnvDTE80Version>8.0.0</EnvDTE80Version>
     <dotnetxunitVersion>2.3.1</dotnetxunitVersion>
     <FakeSignVersion>0.9.2</FakeSignVersion>
@@ -238,11 +238,11 @@
     <SQLitePCLRawbundle_greenVersion>1.1.2</SQLitePCLRawbundle_greenVersion>
     <UIAComWrapperVersion>1.1.0.14</UIAComWrapperVersion>
     <MicrosoftVSSDKBuildToolsVersion>15.8.68-develop-g109a00ff</MicrosoftVSSDKBuildToolsVersion>
-    <VSLangProjVersion>7.0.3300</VSLangProjVersion>
-    <VSLangProj140Version>14.3.25407-alpha</VSLangProj140Version>
-    <VSLangProj2Version>7.0.5000</VSLangProj2Version>
-    <VSLangProj80Version>8.0.0.0-alpha</VSLangProj80Version>
-    <VsWebsiteInteropVersion>8.0.0.0-alpha</VsWebsiteInteropVersion>
+    <VSLangProjVersion>7.0.3301</VSLangProjVersion>
+    <VSLangProj140Version>14.0.25030</VSLangProj140Version>
+    <VSLangProj2Version>7.0.5001</VSLangProj2Version>
+    <VSLangProj80Version>8.0.50728</VSLangProj80Version>
+    <VsWebsiteInteropVersion>8.0.50727</VsWebsiteInteropVersion>
     <vswhereVersion>2.4.1</vswhereVersion>
     <XliffTasksVersion>0.2.0-beta-63004-01</XliffTasksVersion>
     <xunitVersion>2.3.1</xunitVersion>