VS Code provides acontribution point for json schemas. Using this would avoid the need for a$schema property in the bsconfig.json (which currently is a bit broken, since the schema doesn't allow for a$schema property.....). All that would be necessary is the addition of

"jsonValidation": [  {"fileMatch":".jshintrc","url":"https://json.schemastore.org/jshintrc"  }]

to the contributions.