Release v0.56.0

[jansegre]

Changes

• refactor(event-queue): improve event ordering #738
• Release v0.55.0 #741
• chore(feature-activation): update feature endpoint visibility to public #743
• chore(event-queue): update event endpoints visibility to public #746
• chore: improve merkle path log #745
• fix(event-queue): improve memory usage during the load phase #744
• fix(sync-v2): compare to local bytes broke in some cases #747
• refactor(sync-v2): rename SyncAgent module from manager to agent #748
• feat: add best_blockchain in /status payload #704
• fix(tests): make simulator test not flaky on sync-v2 #750
• feat(feature-activation): implement signal bits in mining blocks #703
• chore: improve miner simulator flakiness #753
• chore: bump version to v0.56.0 #757
• chore: add deprecation warning for Python 3.9 #759
• feat(feature-activation): add logging of NOP features #760
• refactor: extracts SysctlRunner from SysctlProtocol #739
• feat(feature-activation): configure NOP features on testnet #761
• fix: imports #762
• chore: improve pubsub #694

Release-candidates

• Release-candidate v0.56.0-rc.1 #764

Checklist

• I've read and followed the release process described in https://github.com/HathorNetwork/ops-tools/blob/master/docs/release-guides/hathor-core.md#stable-release
• The QA process was run successfully during the tests of the corresponding release-candidate(s)

[jansegre]

QA still has to finish, review of everything else can be done in the meanwhile.

Edit: QA finished successfully