[Feature Request] definition underline range

[tjx666]

The underline range should contains warning-text. like:

In order to implements this, you just need to return DefinitionLink but not Location when find definition. You can ref here:

https://github.com/zyrong/vscode-node-modules/commit/b4c6afec31ae3a60934c029d88c86c1761684253#diff-af536053bebc205974ab5adadb522382f458da257d78020c929970af5c1ad8f2R332

@pucelle

[pucelle]

Try to do so, but cant get any definitions after changed Location to DefinitionLink, data in DefinitionLink is validated to be correct.