* Revert "Revert "Update fastssz" (#7100)"
This reverts commit b954db9704.
* Preston's patch
* Merge branch 'master' of github.com:prysmaticlabs/prysm into revert-7100-revert-6760-update-fssz
* Update fssz, add regression test case
* more HTR with fssz
* fix some tests
* only one test left
* Make it so that HTR will work
* gofmt, imports
* gofmt, imports
* fix
* Merge branch 'master' of github.com:prysmaticlabs/prysm into revert-7100-revert-6760-update-fssz
* fix
* Merge branch 'master' into revert-7100-revert-6760-update-fssz
* Merge refs/heads/master into revert-7100-revert-6760-update-fssz
* gaz
* Merge branch 'revert-7100-revert-6760-update-fssz' of github.com:prysmaticlabs/prysm into revert-7100-revert-6760-update-fssz
* Merge refs/heads/master into revert-7100-revert-6760-update-fssz
* fix test
* Merge branch 'revert-7100-revert-6760-update-fssz' of github.com:prysmaticlabs/prysm into revert-7100-revert-6760-update-fssz
* Merge refs/heads/master into revert-7100-revert-6760-update-fssz
* checkpoint
* dont cancel
* remove
* sync mode
* fixes build
* cap max retries when no finalized peers are found
* use max peers
* change it
* fixes TestService_roundRobinSync/Multiple_peers_with_different_finalized_epoch
* fixes blocks fetcher tests
* fixes blocks queue tests
* fixes TestService_blockProviderScoring test
* gofmt
* Merge branch 'master' into useStage1
* Update round_robin.go
preston's review
* Preston's suggestions
* Merge branch 'useStage1' of github.com:prysmaticlabs/prysm into useStage1
* fixes test
* implements weighted round robin in init-sync
* protection against evil peer
* reshuffle
* shorten flag
* deterministic order of wrr
* Merge branch 'master' into init-sync-wrr
* Merge refs/heads/master into init-sync-wrr
* Merge refs/heads/master into init-sync-wrr
* allow peers with the same capacity to pe selected at random
* Merge branch 'init-sync-wrr' of github.com:prysmaticlabs/prysm into init-sync-wrr
* adds wrr to e2e tests
* Merge refs/heads/master into init-sync-wrr
* Merge refs/heads/master into init-sync-wrr
* Merge refs/heads/master into init-sync-wrr
* refactor ReceiveBlockNoPubsub to receive block root
* Refactor ReceiveBlock to receive block root
* A few other minor refactoring to reduce block HTR
* use arg, remove HTR
* more slight refactoring, comments
* fix test build
* Merge refs/heads/master into receive-with-root
* Merge refs/heads/master into receive-with-root