Error Handling Optimization

What's Changed

• Bump github.com/ethereum/go-ethereum from 1.10.19 to 1.10.21 by @dependabot in #429
• change tablesize default by @jingweicb in #435
• Error handling improvement for Syncer and StatefulSyncer by @GeekArthur in #433
• Error handling improvement for asserter package by @GeekArthur in #436
• Error handling improvement for client package by @GeekArthur in #437
• Error handling improvement for constructor related packages by @GeekArthur in #440
• Error handling for fetcher and keys packages by @GeekArthur in #442
• Error handling improvement for parser and reconciler packages by @GeekArthur in #443
• Error handling improvement for storage and util packages by @GeekArthur in #444

Full Changelog: v0.7.11...v0.8.0