Add mautrix-signal to tested appservices

See merge request famedly/conduit!251

feat: Integration with persy using background ops

See merge request famedly/conduit!231

Clean up mod and use statements in lib.rs and main.rs

See merge request famedly/conduit!258

The test job will use the latest stable so all stable lints are included.

Stable under new MSRV.

Rocksdb breaking change. If your server breaks, come to #conduit:fachschaften.org

See merge request famedly/conduit!259

Server ACL support and more config options

Closes #67

See merge request famedly/conduit!248

CI: Fix cargo-test

See merge request famedly/conduit!255

improvement: better default cache capacity

See merge request famedly/conduit!247

Fix(ci): Disable CARGO_HOME caching

See merge request famedly/conduit!246

feat: rocksdb backend

See merge request famedly/conduit!217