Custom Attribute passing in <fragment> not working since 3.8.0

[pmoisel]

readme.md states "Other attributes are allowed and will be passed as well to relevant functions (eg. filterRequestHeaders, filterResponseHeaders, etc.)", and we do rely on this.

After quite some time we wanted to update tailor and I ran into this bug:
fragment.js:26 const getAttributes = (tag, context) =>
changed in commitId d05e816 to improve performance. Thus, now not assigning custom attributes.

Is it okay to go back to "old" behaviour?

Regards

[pmoisel]

duplicate of #287 , fixed in #323

Can we expect a new release? 3.9.2 is of Nov 15, 2018... @vigneshshanmugam ?