* parachains: Adjust `sp_api::Metadata` to the new API

Signed-off-by: Alexandru Vasile <[email protected]>

* parachains: Implement new Metadata trait for bridge/polkadot

Signed-off-by: Alexandru Vasile <[email protected]>

* update lockfile for {"substrate", "polkadot"}

---------

Signed-off-by: Alexandru Vasile <[email protected]>
Co-authored-by: parity-processbot <>