Highlight deinit the same as init.

@Ironham notes that it seems jarring to see an init and then deinit method declared in succession where only one gets a special highlighting.

queries/highlights.scm

@@ -20,6 +20,7 @@
 
 (function_declaration (simple_identifier) @method)
 (function_declaration ["init" @constructor])
+(function_declaration ["deinit" @constructor])
 (throws) @keyword
 "async" @keyword
 "await" @keyword