Updated mediawiki/extensions Project: mediawiki/extensions/Widgets abea2b883d6bf6c100ddda2e9c54c0d4d40e9bd5

Fix possibility for arbitrary HTML output

Trusting the page content is inherently insecure. Instead, store the
parsed content in an array and output an index to retrieve it later.

Modernize code style slightly, while at it.

Bug: T88964
Change-Id: I00ede9c7f333f32f2cc7722781b06f97a544927f