Convert attr-name to attrName when referencing in data.

[zachleat]

parse5 enforces the HTML specification and converts both attributes and @-prefixed properties to lowercase

<my-component attrName="test" @propName="test">

(is referenced inside my-component as attrname and propname respectively).

First reported by @voxpelli: #62 (comment)

I don’t know if we necessarily want to add to the parsing complexity but a nice workaround could be to convert dash names to camelcase:

e.g. @prop-name would be referenced as propName and attr-name would be referenced as attrName

Open for discussion here!

[zachleat]

Future note for me: the code for this is merged but disabled until 0.8.0

[zachleat]

Shipping with v0.8.0

[anghelos]

Is there any way to escape that for HTML data-* attributes? Say I want an attribute to be data-image and remain as such. Also see #178 and #163