Dapper.Contrib Key caching issue

There is a bug in the caching logic of the KeyProperties. Method UpdateAsync() and DeleteAsync() alter the original cached list of properties key code ref.
So, if the first operation is a Update or Delete the "KeyPropertiesCache" return a pointer to the original list and the Update/Delete method add the explicitKeyProperties to the list. When the Insert() get called the "allPropertiesExceptKeyAndComputed" is wrong.

Test to reproduce it:

    public async Task TestMethod()
    {
        var myClass = new MyClass()
        {
            AccountId = Guid.NewGuid(),
            Name = "Some name"
        };

        using (IDbConnection db = new SqlConnection(connectionString))
        {
            //var x = await db.InsertAsync(myClass); // Add and test pass
            var t = await db.UpdateAsync(myClass);
            var r = await db.InsertAsync(myClass);                
        }
    }

Suggested fix that all returns from cache-layer (KeyPropertiesCache, ExplicitKeyPropertiesCache, ComputedPropertiesCache etc.) should call .ToList() on the item before return it.

The relevant cache logic is in Dapper.Contrib/SqlMapperExtensions.Async.cs around line 217. Start with UpdateAsync, DeleteAsync, InsertAsync, and the KeyPropertiesCache behavior described in the issue, then reproduce the provided UpdateAsync-then-InsertAsync sequence. Done means cached property lists are not altered by update or delete operations and the regression case passes.