Revert to version 2.1

src/NUnitTestAdapterInstall/source.extension.vsixmanifest

@@ -1,9 +1,9 @@
 <?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="NUnitTestAdapterInstall..7c53286e-ac4f-485f-915c-5ec5a4c47b0c" Version="2.2.0.0" Language="en-US" Publisher="Terje Sandstrom" />
+    <Identity Id="NUnitTestAdapterInstall..7c53286e-ac4f-485f-915c-5ec5a4c47b0c" Version="2.1.0.0" Language="en-US" Publisher="Terje Sandstrom" />
     <DisplayName>NUnit 2 Test Adapter</DisplayName>
-    <Description xml:space="preserve">NUnit 2 adapter for running tests in Visual Studio. Works with NUnit 2.x, use the NUnit 3 adapter for 3.x tests.</Description>
+    <Description xml:space="preserve">NUnit 2 adapter for running tests in Visual Studio 2012 and newer. Works with NUnit 2.x, use the NUnit 3 adapter for 3.x tests.</Description>
     <MoreInfo>https://github.com/nunit/docs/wiki/VS-Adapter</MoreInfo>
     <License>license.rtf</License>
     <Icon>nunit_32x32.png</Icon>