Declare support for VS2026.

Author: chemodax

EditorConfigGuidelines/source.extension.vsixmanifest

@@ -9,18 +9,18 @@
         <Tags>.editorconfig,guidelines</Tags>
     </Metadata>
     <Installation>
-        <InstallationTarget Id="Microsoft.VisualStudio.Community" Version="[17.0, 18.0)">
+        <InstallationTarget Id="Microsoft.VisualStudio.Community" Version="[17.0, 19.0)">
             <ProductArchitecture>amd64</ProductArchitecture>
         </InstallationTarget>
-        <InstallationTarget Id="Microsoft.VisualStudio.Community" Version="[17.0, 18.0)">
+        <InstallationTarget Id="Microsoft.VisualStudio.Community" Version="[17.0, 19.0)">
             <ProductArchitecture>arm64</ProductArchitecture>
         </InstallationTarget>
     </Installation>
     <Dependencies>
         <Dependency Id="Microsoft.Framework.NDP" DisplayName="Microsoft .NET Framework" d:Source="Manual" Version="[4.5,)" />
     </Dependencies>
     <Prerequisites>
-        <Prerequisite Id="Microsoft.VisualStudio.Component.CoreEditor" Version="[17.0,18.0)" DisplayName="Visual Studio core editor" />
+        <Prerequisite Id="Microsoft.VisualStudio.Component.CoreEditor" Version="[17.0,19.0)" DisplayName="Visual Studio core editor" />
     </Prerequisites>
     <Assets>
         <Asset Type="Microsoft.VisualStudio.VsPackage" d:Source="Project" d:ProjectName="%CurrentProject%" Path="|%CurrentProject%;PkgdefProjectOutputGroup|" />