Hey there :)

When using Pug templates with backtick-quoted attributes containing both single and double quotes, the parser generates invalid HTML that Vue's compiler cannot parse

span(
  :class=`[
    "my-class",
    {
      "my-class--active": (state.type === 'active')
    }
  ]`
)

it ends up with errors such as :

error TS1005: ':' expected.
error TS1005: ',' expected.
error TS1003: Identifier expected.

We noticed this while migrating from vue-pug-plugin to @vue/language-plugin-pug

I tried to address a fix to the lexer and provide some basic tests as well. It's better than nothing :)

Let me know if anything needs to be changed.