* random fixes
* create dump dir on startup
* don't crash on failure to write dump
* fix a few `uint64` instances being used when indexing arrays - this
should be a compile error but isn't due to compiler bugs
* fix standalone test_block_pool compilation
* add signed block processing in ncli
* reuse cache entry instead of allocating a new one
* allow for small clock disparities when validating blocks
* in makeBeaconBlock - use rollback instead
* in tests - this helps state_sim give more accurate data and makes it
30% faster
* fix some usages of raw BeaconState
* fix warnings by switching from deprecated chronos API addTimer(...) to setTimer(...) and removing especially some unnecessary chronicles and extras imports from test suite modules
* update a couple v0.10.1 spec references to v0.11.1
* crypto: cleanup
* fix several Defect-on-user-input
* make crypto interface more similar to secp
* use `crypto.nim` in all of nbc
* digest: raises
* fix
* vendor
* remove all but one UnusedImport warning
* bump a few more spec version references from v0.10.1 to v0.11.1
* more v0.10.1 spec reference updates/removals
* yet more v0.10.1 spec reference updates
* fix crash when state root is present but state is missing
* fix state root removal when state is removed
* fix block pool initialization which needs tail state
* remove tail block pruning
* incomplete - fork states are not pruned
* incomplete - fork blocks are not pruned
* incomplete - empty slot states are not pruned
* unknown - tail/finalized block on empty slot might be incorrect
* fix slot time navigation, add tests
* skip block proposal if head is more recent already - shouldn't happen
* use correct head when attesting to previous blocks
* log slot start/end processing
* state data cache in block pool
* keep head state around
* more attestation logic in attestation pool
* first fork choice tests (!)
* fix fork choice (it's still likely broken / out of date)
* rename get_genesis_beacon_state(...) to initialize_beacon_state_from_eth1(...); remove unused vestiges get_temporary_block_header(...) and get_empty_block(...); partly align initialize_beacon_state_from_eth1(...) with 0.8.0 version; implement CompactCommittee object type; update process_final_updates(...) to 0.8.0
* mark get_shard_delta(...) as 0.8.0
* mark get_total_active_balance(...) and epoch transition helper functions as 0.8.0
* move FORK_CHOICE_BALANCE_INCREMENT, not in spec anymore, to sole user in fork_choice
* Initial move constants to mainnet preset
* Bump fixtures to include shuffling with minimal preset
* Add minimal preset with shuffling test
* Add minimal preset to the full test suite
* use preset() everywhere