* update get_seed(...) and get_beacon_proposer_index(...) to 0.9.0, implement compute_proposer_index(...), and render 3 more test fixtures working
* rm stray Crosslink reference which prevented static SSZ tests from building
* remove references to removed tests in attestations test fixture; add minimal-preset block sanity test, plus all but one of mainnet tests for block sanity to transition fixtures
* transition deposit operations fixture to 0.9.0
* mark slash_validator(...) as 0.9.0
* switch remaining non-ref objects to ref objects to maybe avoid crashes in CI
* remove unused helpers/debug_state imports
* update test submodule [skip ci]
* rename the process_lfs script to setup_official_tests [skip ci]
* clarify that the existing LFS is for json files [skip ci]
* Update again to use download/unpack function library
* update the test downloading script [skip ci]
* Update EF fixtures with new test path
* fix symlink order
* Fix relative:absolute symlink issue
* add symlink existence check
* setup_official_tests.sh: refactoring
* rename compute_epoch_of_slot(...) to compute_epoch_at_slot(...)
* remove some unnecessary imports; remove some crosslink-related code and tests; complete renaming of compute_epoch_of_slot(...) to compute_epoch_at_slot(...)
* rm more transfer-related code and tests; rm more unnecessary strutils imports
* rm remaining unused imports
* remove useless get_empty_per_epoch_cache(...)/compute_start_slot_of_epoch(...) calls
* rename compute_start_slot_of_epoch(...) to compute_start_slot_at_epoch(...)
* rename ACTIVATION_EXIT_DELAY to MAX_SEED_LOOKAHEAD
* update domain types to 0.9.0
* mark AttesterSlashing, IndexedAttestation, AttestationDataAndCustodyBit, DepositData, BeaconBlockHeader, Fork, integer_squareroot(...), and process_voluntary_exit(...) as 0.9.0
* mark increase_balance(...), decrease_balance(...), get_block_root(...), CheckPoint, Deposit, PendingAttestation, HistoricalBatch, is_active_validator(...), and is_slashable_attestation_data(...) as 0.9.0
* mark compute_activation_exit_epoch(...), bls_verify(...), Validator, get_active_validator_indices(...), get_current_epoch(...), get_total_active_balance(...), and get_previous_epoch(...) as 0.9.0
* mark get_block_root_at_slot(...), ProposerSlashing, get_domain(...), VoluntaryExit, mainnet preset Gwei values, minimal preset max operations, process_block_header(...), and is_slashable_validator(...) as 0.9.0
* mark makeWithdrawalCredentials(...), get_validator_churn_limit(...), get_total_balance(...), is_valid_indexed_attestation(...), bls_aggregate_pubkeys(...), initial genesis value/constants, Attestation, get_randao_mix(...), mainnet preset max operations per block constants, minimal preset Gwei values and time parameters, process_eth1_data(...), get_shuffled_seq(...), compute_committee(...), and process_slots(...) as 0.9.0; partially update get_indexed_attestation(...) to 0.9.0 by removing crosslink refs and associated tests
* mark initiate_validator_exit(...), process_registry_updates(...), BeaconBlock, Eth1Data, compute_domain(...), process_randao(...), process_attester_slashing(...), get_base_reward(...), and process_slot(...) as 0.9.0
* enable all sanity slots tests
* enable more tests in sanity blocks
* win64 strikes again #435
* workaround invalid handle in win64 CI
* empty_epoch_transition_not_finalizing only valid in minimal preset
* sanity block ETH1 data votes are also minimal only
* "industrialize" skipping win64 CI
- reintroduce actually working tests
- skip BLS priv_to_pub (tested in blscurve + broken by #440 and #435)
* missing echo
* try/except OSError doesn't seem to work in unittest so plain ignore + move x64 first for fail fast
* ignore transfers completely in WIn64
* Prepare test suite for transfers
* split API process_transfer / processTransfers
* Add range checks on transfer
* Fix invalid transfer conditions
* don't test on windows 64-bit #435
* add test suite for voluntary exit
* update API to process_voluntary_exit
* Add range check of validator_index for voluntary exits
* Revert to dual single + multiple voluntary exits API + enable in test suite
* no cache or mocking needed
* Add attestation unit test
* process_attestation doesn't throw exceptions
* Allow SSZ deserialization of both real and invalid signatures
* Add new process_attestation checks - pass all process_attestation tests
* Add sanity check for #361
* Fix SSZ testing after fromBytes/fromSSZBytes changes
* Add sanity check for slot processing (also impacted by https://github.com/status-im/nim-beacon-chain/issues/373)
* use reportDiff also for all state tests vs EF
* initial sanity checks for blocks - workaround zero signature in block headers: https://github.com/status-im/nim-beacon-chain/issues/374
* Remove generic object variant compare commented code
* Add the one block state transition sanity checks
* generalize blocks test to multiple blocks
* simplify slots test runner
* Add official epoch transitions, sanity blocks, sanity slots to the test suite
* Fix index out-of-bounds in initiate_validator_exit - enable proposer slashings unittest
* Update BLS fixtures to 0.8.3
* Bump fixtures with shuffling with minimal preset
* Update shuffling tests
* parseTest generic over file format (Json or SSZ)
* Initial crosslink parsing commit for debugging Nim crash
* Workaround https://github.com/status-im/nim-beacon-chain/issues/369
* Crosslink test works for minimal - https://github.com/status-im/nim-beacon-chain/issues/369 is back on mainnet
* Use ref objects to workaround https://github.com/status-im/nim-beacon-chain/issues/369
* Generalize state transition epoch test to all epoch tests
* Fix slashing (potential uint64 overflow in previous spec)
* Add a state debugging macro to deeply inspect the wrong fields
* make reportDiff visible
* Improve the debug state macro for containers
* Update fixtures to 0.8.3
* v0.8.1 tests use new test path
* LFS caching: handle multiple versions of json_tests
* Enable paths > 260 characters in appveyor
* Appveyor: use git clone core.longpaths + the env variable at startup
* improve process_lfs.sh and cleanup submodules