Add linter support for widget's options

[valerauko]

Adds support for the following

Directive options

• :managed
  • [x] :dispose
  • [x] :refresh-on
• :watch
  • [x] :refresh-on
  • [x] :dispose
  • [x] :dedup
  • [x] :>
• :bg-watcher
  • [x] everything :watch can do

widget options

• [x] :keep-alive
• [x] :spy
• [x] :padding
• [x] :color
• [x] :width
• [x] :height
• [x] :bind

[cgrand]

I have plans to update :bg-watcher, it will differ from :watch but for now it's ok. Thanks!