Plugin is still not HTML valid

Hello,

Dear @heateor Support,
I’ve found that HTML markup of plugin is still not valid. Using online tools like https://validator.w3.org/ I get errors:

Error: Attribute ss-offset not allowed on element div at this point.
Error: Attribute heateor-sss-data-href not allowed on element div at this point.
Error: Attribute alt not allowed on element i at this point.
Error: Element ss not allowed as child of element i in this context. (Suppressing further errors from this subtree.)

There are some topics (2 and 4 years earlier) where you responded that you are going to fix this in next realses – really?

Plugin works well but that is unfair that you totally ignore that issues.
Really looking forward to get any improvements (use standard data-attr, propper <button> tag, etc.).

Best,
Sebastian