v0.12.4

• Added SendReceipt to support private read receipts and thread receipts in the same function. MarkReadWithContent is now deprecated.
• Changed media download methods to return errors if the server returns a non-2xx status code.
• Removed legacy sql_store_upgrade.Upgrade method. Using store.DB.Upgrade() after NewSQLCryptoStore(...) is recommended instead (the bridge module does this automatically).
• Added missing suggested field to m.space.child content struct.
• Added device_unused_fallback_key_types to /sync response and appservice transaction structs.
• Changed ReqSetReadMarkers to omit empty fields.
• Changed bridge configs to force sqlite3-fk-wal instead of sqlite3.
• Updated bridge helper to close database connection when stopping.
• Fixed read receipt and account data endpoints sending null instead of an empty object as the body when content isn't provided.