Vendor updates about sugarcube-2

[tmedwards]

Most vendor files appear to not be up-to-date:

Some of that is by design. In particular: FileSaver, lz-string, normalize.css, seedrandom.js. The updates to these have generally been either adding unnecessary functionality, moving functionality away from SugarCube's needs, or simply developer churn. In specific cases—e.g., lz-string—there's also the worry that changes could result in data loss.

I'll take a closer look anyway, but I doubt I'll do much updating here.

es6-shim v0.35.4 -> v0.35.5

Ignoring this as the only material update was to the shams, which SugarCube does not include.

classList v??? -> v1.2.20180112 (probably?)

1.2.20171210 was the last code update. 1.2.20180112 was just a devel update.

Not sure which version is currently vendored, since the bundled comment doesn't specify, and I didn't edit it as I usually do when the library authors don't do it themselves—which implies it's probably pretty old.

I'll update to 1.2.20171210 and edit the bundled comment to denote to the release.

es5-shim v4.5.13 -> v4.5.14
imagesLoaded v4.1.0 -> v4.1.4
jQuery v3.4.1 -> v3.5.1

Updating.