Update dependency wpackagist-plugin/wp-super-cache to v1.9.2

See merge request !216

Update dependency noblogs/themes-child to v0.5.6

See merge request !199

The themes are 10 years old and unsupported, patches are just to avoid
breaking existing blogs.

See issue #101.

Without this package PHP can't generate OpenSSL keys apparently.

Using what is hopefully the right format for the tx.allowed_request_content_type
configuration variable.

Only comment changes, illustrating the new defaults.

This reverts commit 9c69d4de.

Replace an upstream unsupported theme with our own slightly
patched version from themes-misc.

Update dependency wpackagist-plugin/event-organiser to v3.12.2

See merge request !201

This reverts commit 4acd8455.

Update dependency noblogs/themes-misc to v0.1.5

See merge request !212

Update dependency noblogs/ai-global-activity-plugin to v0.0.22

See merge request !211

Add the memcached plugin (object caching)

See merge request !209

It shouldn't be necessary in our setup, and it just makes keys
needlessly longer.

Update dependency noblogs/ai-authenticate-rest-api-plugin to v0.0.3

See merge request !210

Update more twenty* themes

See merge request !208

Update dependency noblogs/ai-authenticate-rest-api-plugin to v0.0.2

See merge request !203

Update dependency wpackagist-plugin/autopost-to-mastodon to v3.6.6

See merge request !200