FR: @DynamicParameter converter

[Hubbitus]

Hello.

You have com.beust.jcommander.Parameter#converter to easy write user converters for list values, but com.beust.jcommander.DynamicParameter has no such option.

But it may be helpful for map also! So instead of just Map<String, String> we may have something like:

@DynamicParameter(names = "--keep", description = "Dynamic parameters go here", converter = CustomUserClassConverter.class)
Map<String,CustomUserClass> keeps = new HashMap<>();

[cbeust]

Sounds good, would you be interested in sending a PR?

[Hubbitus]

Sure I could try.