Released hexo-tag-embed instead of bundled tags (gist, jsFiddle, vimeo, youtube) for hexo v7.0.0.

[yoshinorin]

@hexojs/core

As you know, 2 months ago we decide to drop 4 bundled tag features (gist, jsFiddle, vimeo, youtube) from hexo.

• refactor: drop gist tag #5067
• refactor: drop youtube tag #5064
• refactor: drop vimeo tag #5065
• refactor: drop jsfiddle tag #5066

It means we have to release an alternative plugin (or something) before release the next major version (v7.0.0). Today, I published hexo-tag-embed@v1.0.0-rc.1 for an alternative way.

https://www.npmjs.com/package/hexo-tag-embed/v/1.0.0-rc.1

I try to check behavior (only youtube-tag) locally, it works well. I'm going to bump version to v1.0.0 after release hexo@v7.0.0.

Thank you :)