cess-miner v0.8.1

Changed

1. Upgraded the pois library to v0.6.1b
2. Update some variable names

Fixed

1. Fixed the issue where the claim command was successfully executed but failed

Full Changelog: v0.8.0...v0.8.1

Basic features

1. Innovative POIS algorithm
2. Innovative service data aggregation proof algorithm
3. Rpc framework compatible with Polkadot and any Substrate based chain
4. Developer favorite feature-rich cess-go-sdk
5. Smart space management
6. Reliable data recovery mechani