SystemVerilog 2.4.0 Changelog:

## Improvement ##
 - Completion now supports class
  * proposes only public member
  * snippets for each arguments of a function
 - Tooltip: extended support for class
  * shows the base class, if any
  * shows members and functions
  * Colorize function name using theme color

## Bug Fixes ##
 - Highlight:
  * Handles user-defined static variable
  * Handles variable with parameterized parameters
  * Fix typedef enum content highlighting
 - get_macro(): handle case where the `define is indentend (affect the tooltip feature)
