Make text of symbol as strikethrough when deprecated

[afucher]

Is your feature request related to a problem? Please describe.
Usually editors shows deprecated symbols with strikethrough, so is easier to see it. Today clojure-lsp shows underlined with a message about the deprecation.

Describe the solution you'd like
Symbol should be showed with strikethrough (image example from Calva)

Describe alternatives you've considered
None.

Additional context
This is how it is today:

[ericdallo]

I confirmed this should be fixed after #53