Make vsix dependency version range less strict

Makes future VS versions able to support loading the extension
(backwards compatibility ftw)

Author: shana

src/GitHub.VisualStudio/source.extension.vsixmanifest

@@ -15,7 +15,7 @@
   </Installation>
   <Dependencies>
     <Dependency Id="Microsoft.Framework.NDP" DisplayName="Microsoft .NET Framework" d:Source="Manual" Version="[4.5,)" />
-    <Dependency Id="Microsoft.VisualStudio.MPF.14.0" DisplayName="Visual Studio MPF 14.0" d:Source="Installed" Version="[14.0]" />
+    <Dependency Id="Microsoft.VisualStudio.MPF.14.0" DisplayName="Visual Studio MPF 14.0" d:Source="Installed" Version="[14.0,]" />
   </Dependencies>
   <Assets>
     <Asset Type="Microsoft.VisualStudio.MefComponent" d:Source="Project" d:ProjectName="Rothko" Path="|Rothko|" />