Ruby ampersand dot `&.` syntax

[Kayyow]

Your environment

• vscode-ruby version: 0.17.0
• Ruby version: 2.5
• VS Code version: 1.21
• Operating System: Arch Linux

Make sure you have ruby, ruby-debug-ide and ruby-debug-basex19 installed before submitting your issue -- thank you !

Expected behavior

It would be cool if the Ruby extension could colorize the "ampersand dot" &. of Ruby which is used as an equivalent of the Rails try(:prop) method. This Ruby syntax isn't really clear so I think it's important to have a great colorization to easily read it.

Actual behavior

The Ruby syntax "ampersand dot" isn't colorized at all :
model&.prop&.prop2

[wingrunr21]

Closing as dup of #288