How do I develop Component Data of Vetur as an extension

[wq liu]

I make changes based on Custom-data-sample

{
	"name": "custom-data-sample",
	"description": "Custom Data sample extension for VS Code",
	"version": "0.0.1",
	"publisher": "vscode-samples",
	"repository": "https://github.com/Microsoft/vscode-extension-samples",
	"engines": {
		"vscode": "^1.38.0"
	},
	"contributes": {
		"html": {
			"customData": [
				"./html.html-data.json"
			]
		}
	},
    "files": [
        "vetur/tags.json",
        "vetur/attributes.json"
    ],
    "vetur": {
        "tags": "./vetur/tags.json",
        "attributes": "./vetur/attributes.json"
    }
}

and add Vetur's configuration files.
But it does not take effect after running the extention.
Know someone who can answer?
Thanks!