Enhance: removed unused `.this` for dev

[Malix-Labs]

See #5

I'm not sure yet about this one since it's in the scope of the script and not the specific iframe.

I purposefully didn't remove the frame parameter of the htmz function for now, if there would be some dev cases where it would be desirable, maybe there is none and should also be removed.

[Kalabasa]

Not sure about this either. The development version is supposed to be "deminified" so, no shortcuts + more explicitness for better understandability.