Tooling update: new version of the nimlangserver and the vscode extension

[jmgomez]

CodeLLDB is the recommended one. Probably we will end up making it a dependency 
of our extension. Notice there is an option to define the default target 
(`lldb`) called `nim.debug.type` so you can use another extension if you want.
    
    
     type of debugger to use when using Nim: Debug selected file. The value is 
the same value as typically used in launch.json for the type attribute.
    
    Run