Support data-* global attributes

[hbcondo]

Is your feature request related to a problem? Please describe.
Link items using a tags do not render or strip out data-* global attributes

Describe the solution you'd like
Have data-* global attributes returned in the HTML rendered by this plugin

Describe alternatives you've considered
Not aware of any

Additional context
Using the example on the plugin page:

'<a href="/item-1/" data-myattr="/myval/">Item 1</a>,1,1;<a href="/item-2/">Item 2</a>,0,1'

In the code above, the level page will return the a tag with the href but without the data-attr attribute