"data" outside top-level specification

If I load local data on the top-level of a spec it works fine, but if “data” appears somewhere else it doesn’t work. For example this works

{
  "$schema": "https://vega.github.io/schema/vega-lite/v3.json",
  "data": {
    "url": "myfile.csv"
    },
    "Rest of specification"
}

While this doesn’t

{
  "$schema": "https://vega.github.io/schema/vega-lite/v3.json",
  "layer": [
    {
      "data": {
      "url": "myfile.csv"
      },
      "Rest of specification"
}

[Corvince]

Hey there, after quite some delay I just wanted to say thank you! Both locally hosted data and “layered” data work like a charm!

[RandomFractals]

@Corvince this should now work for all local/relative data references in vega spec. I am aware of.

Please review this patch update code here if you’d like: https://github.com/RandomFractals/vscode-vega-viewer/commit/8d49d4e309892a0aea9b19379dec9ae99b0ec591#diff-5c245625569aa17bdc70402dfc2e4504

and let me know if there are any other edge cases I’ve missed for this feature request.