Accept any `data-` attributes in behavior directive

[attakei]

Description

revealjs-section and revealjs-break have options to handle behaviors. (List is here)

These are attributes for using by Reveal.js itself, but there are cases to need set custom attributes for using external plugins.

To Do

• [x] Find a design that directives accepts any or data- options.
• [x] Implement if it can.

[attakei]

Release feature by v3.0.0

[achimwackerow]

Thanks for implementing that any data- option is accepted.