Upgrade MediaElement to 2.18.1

[wonderboymusic]

Changelog: ​https://github.com/johndyer/mediaelement/compare/2.17.0...2.18.1

This might require monkey-patching, which I'll do.

[wonderboymusic]

In 34048:

In [30082], hardcoded heights were removed on the front end for videos rendered via shortcode. These values were not removed from the admin, which was an oversight.

See #33798.

[wonderboymusic]

In 34049:

After [34048], restore the else statement for h (height of video) in wp_underscore_video_template().

See #33798.

[wonderboymusic]

In 34050:

Upgrade MediaElement to 2.18.1 - monkey-patches to allow H264 in Chromium.

Changelog: ​https://github.com/johndyer/mediaelement/compare/2.17.0...2.18.1

See #33798.

[bradyvercher]

There was a breaking API change in one of the public methods in 2.18 that's throwing errors everywhere I'm using it. ​I submitted a PR upstream to fix backward compatibility and it got merged a couple days ago.

What's the best way of getting that incorporated here? Can I cherry pick that commit and apply it on top of the monkey patch and upload the diff here?

It also looks like the version number for the mediaelement script needs to be bumped in script-loader.php.

[wonderboymusic]

I will monkey this

[wonderboymusic]

In 34339:

MediaElement: apply monkey patch to include a PR which fixes a breaking change made upstream on a public interface:
​https://github.com/johndyer/mediaelement/commit/ccba8d0b6ad1661026e43879876126223c88c5e2

Props bradyvercher.
Fixes #33798.

[dd32]

In 35713:

Bump the version of MediaElement in script-loader.php to match what we're shipping with.
See #33798
Fixes #34743