[ilib] Some optional arguments are not considered optional

[kLabz]

Using net-libs, some optional arguments are not defined as optional. They are defined as

public static Task<List<TSource>> ToListAsync<TSource>(this IQueryable<TSource> source, CancellationToken cancellationToken = null)

(See EntityFrameworkQueryableExtensions.ToListAsync())

Which is parsed as

static method ToListAsync : function generic classtype System.Threading.Tasks.Task`1<generic classtype System.Collections.Generic.List`1<!0>>(generic classtype System.Linq.IQueryable`1<!0>, valuetype System.Threading.CancellationToken)