Clipboard Item updates

[Rumyra]

A checklist to help your pull request get merged faster:

• Summarize your changes

Adding data to reflect current spec https://www.w3.org/TR/clipboard-apis/#clipboard-interface

• New members added -> presentationStyle will have MDN page clipboarditem updates content#2829
• Updating chrome implementation to reflect this issue https://bugs.chromium.org/p/chromium/issues/detail?id=1014310

• Data: link to resources that verify support information (such as browser's docs, changelogs, source control, bug trackers, and tests)

https://bugs.chromium.org/p/chromium/issues/detail?id=1014310
mdn/content#2514

• Data: if you tested something, describe how you tested with details like browser and version

Testing code in Chrome 90 (Canary), FF 87 and Safari 14

• Review the results of the linter and fix problems reported (If you need help, please ask in a comment!)

Tests pass ☑️

• Link to related issues or pull requests, if any

As above

[ddbeck]

Hi, @Rumyra. In line comments, I've proposed a couple of changes. Thank you for the PR!

[Rumyra]

Thanks again @ddbeck - updated as per feedback ☺️

[ddbeck]

Great. This can go out with today's release. Thank you! 🎉

[Rumyra]

\o/ thank you @ddbeck ! I'm v happy I only revised this once 😆 Very appreciative of the feedback 👍

[ddbeck]

@Rumyra no problem! And there's lots to learn about BCD. The revisions aren't a sign that something is wrong, just that this stuff is complicated.