fix[script]: Unify base64 result output with the rest of the results

[mgajdar]

No description provided.

[brodjieski]

I like the idea of matching the output format for the base64 results. Rather than having it be a dictionary, I think it would be better to just store the value of the result. This would better align with the other results. So instead of result['base64'] = {result_value} maybe just do result['base64'] = result_value?

Also, there is an outstanding item I've been meaning to tackle, and if you'd like to include it with your change, that would be awesome. The log for the base64 expected results is being forced to lowercase, which make the value incorrect in the log output. If you want to remove the lower() call in line 997, that would be a bonus ;)