matrix: Update bridge to 3.0.1

Currently needs a hack in
/var/lib/synapse/matrix-appservice-irc/node_modules/matrix-appservice-bridge/lib/components/media-proxy.js
to replace the `"http"` require with `"https"` or the proxy won't work.

See: https://github.com/matrix-org/matrix-appservice-bridge/issues/507