• Reworked the Matrix notifier introduced in v1.20.0, which was not working as intended (fixed panic upon notification dispatch).
• Made notifier-matrix a default build feature, as the Matrix notifier now depends on reqwest (matrix-sdk and tokio were removed).
• Removed the configuration options: notify.matrix.username, notify.matrix.password and notify.matrix.device_id, as notify.matrix.access_token suffice.