FR: Support semantic color token customization

[Christilut]

• I have searched through existing issues
• I have read through docs
• I have read FAQ

Info

• Platform: all
• Vetur version: 0.24.0
• VS Code version: 1.45.0

Problem

In my user settings I added the following:

  "editor.semanticTokenColorCustomizations": {
    "[Default Dark+]": {
      "rules": {
        "*.readonly": "#9cdcfe",
        "enum": "#8f871f",
        "enumMember": "#bdb333"
      }
    }
  }

This works in TypeScript files:

But does not seem to work in .vue files yet:

It would be nice if this is supported in vue files too.