Extension should ignore `purge` option

[bradlc]

I've also updated everything and found a curious anomaly... When using npx tailwind init to create a tailwind.config.js file, the purge property accepts an array. However it's an object in the tailwind docs so we start with purge: [], at the top of the file and with all other changes everything works fine. But as soon as we want to force a purge (according to the tailwind docs by setting purge to true inside an purge object) like this

purge {
  enabled: true
},
// ... other settings here

the tailwind intellisense plugin stops providing suggestions. What's more... when you revert purge back to an empty array (i.e. what you started with), it takes a VS Code reload/restart for intellisense to start providing suggestions again.

Curious! Hope that helps to debug.

Originally posted by @gavinworks in #130 (comment)