Missing overloads in Dapper 1.50.2

[nvivo]

Using dapper 1.50.2, the following overloads seem to be missing:

QueryFirstAsync(string)
QueryFirstOrDefaultAsync(string)
QuerySingleAsync(string)
QuerySingleOrDefaultAsync(string)

As something like cn.QueryFirstAsync("select...") give the following error:
CS1503 Argument 2: cannot convert from 'string' to 'Dapper.CommandDefinition'

Edit: It seems the methods are there, but for some reason the compiler is resolving only these four methods to the wrong overload.

[nvivo]

I have been looking into this, still have no clue on why it happens or how to fix it.

How to reproduce:

using Dapper;
using System.Data;

class Program
{
    static void Main(string[] args)
    {
        IDbConnection cn = null;
        cn.QueryFirstAsync("foo"); // cannot convert from 'string' to 'Dapper.CommandDefinition'
    }
}

Any ideas?

[NickCraver]

Fixed for the next release! Merging in and releasing likely this week or next.