Optional upgrade but suggested.
This is the final release of a series releases to upgrade libp2p. In v3.8.1, tls and noise were enabled. In v3.9.1, secio was disabled by default. In this release, secio was totally dropped.
- Upgrade libp2p to v0.22.0
- Remove some unused codes like delaytx and old fork
- Fix the error "The request SyncBlockHashRequest from ... timed out"