* remove remaining parts of the Gratitude Pallet

This upgrade should be fast track to prevent potential misuse of the gratitude pallet.

This referendum upgrades bridge hub version.

Provide maintance to the Substrate - api - client library which includes updates, user support, and small improvements.



1. Upgrade to remove the remaining parts of the Gratitude Pallet
2. Upgrade should be done fast-track to prevent misuse
3. Upgrade should be done in close collaboration with Assembly Technical Committee

Version 1.3.1

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