lsp-html - update to new version of custom data and add new configuration options

[themkat]

Updating custom data

I could not get custom data to work on my machine with a simple option/property/setting. From reading the vscode html tools source code, it seems that this extension uses the property internally in the same way we do here (read diffs in this PR). In summary:

• Send the data paths to the language server in the initialization options field.
• Handle a request for the content of these files in the client code.

When the content of these files have been sent to the server, it seems to work perfectly. I can complete, view hover information and more. I used various projects, like the example project from the vscode team. I added an extra custom data definition with some bogus to make it more interesting:

{
  "version": 1.1,
  "tags": [
    {
      "name": "dafuq",
      "description": "The super cool new tag for the cool kids",
      "attributes": [
        { "name": "isThisShit" },
        {
          "name": "test",
          "values": [
            {
              "name": "is-working"
            }
          ]
        }
      ]
    }
  ]
}

Completion of attributes also works perfectly. I just have to be sure to activate yas-minor-mode (or similar templating system).

Fixes #4327 (probably)

New configuration options

Added lsp-html-hover-documentation and lsp-html-hover-references, which are both on by default (even if not set from the language server side). I think it makes sense to be able to set these, especially on older machines where I try to get more performance out of turning off features.

[jcs090218]

One small warning:

lsp-html.el:191:2: Warning: docstring wider than 80 characters

[themkat]

One small warning:

lsp-html.el:191:2: Warning: docstring wider than 80 characters

Fixed it in latest commit 🙂

[jcs090218]

Thank you!