fix: add hidden input for lit-element after render completes

[brion-fuller]

Lit-element rendering has issue with setting element before it does it's first update. You can see this best when creating a custom element that uses a select element underneath. Options for the select are rendered in plain text a few elements because the custom element.

This is framework specific so I don't know if this is something you would like in this polyfill.

[calebdwilliams]

This was released in 0.1.26. I didn't notice this until it was too late, but next time please don't modify the package name, version or publishConfig in PRs. This is open source so you're obviously welcome to use and modify the code as long as it's within the parameters of the license, but I was super confused why I couldn't publish for a bit.

[brion-fuller]

Oh wow... sorry that was after I put the PR. Yeah that wasn’t supposed to come over. I’ll setup a branch next time.

[calebdwilliams]

Hey, no worries. If you don't mind me asking what's the second package for? Is it just to test and use before I merge/release?