Add support for the "_" Hyperscript attribute.

[maciejtrybilo]

No description provided.

[sliemeobn]

hey, thanks for this!

looking very good.

I am wondering if .hyperscript("blablabla") would be a better name. .hs is neither a common abbreviation I think nor does it resemble "_". might as well go for full clarity and readability.

[sliemeobn]

@maciejtrybilo wdyt? (see comment above)

[maciejtrybilo]

@sliemeobn I'm sorry for dragging it on! I've been dropping the ball on side quests recently.

I get your point on the naming. ._ would have worked too although it looks a little cryptic.