update to GP 0.6.6

[qiweiii]

gavofyork/graypaper@v0.6.4...v0.6.6

[codecov]

Codecov Report

Attention: Patch coverage is 37.96992% with 495 lines in your changes missing coverage. Please review.

Project coverage is 79.71%. Comparing base (4d4178e) to head (ba9a06a).
Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
.../Blockchain/VMInvocations/HostCall/HostCalls.swift	0.00%	176 Missing ⚠️
...ockchain/Sources/Blockchain/Types/WorkResult.swift	51.35%	54 Missing ⚠️
...ces/Blockchain/RuntimeProtocols/Accumulation.swift	3.77%	51 Missing ⚠️
...ain/Sources/Blockchain/Config/ProtocolConfig.swift	40.25%	46 Missing ⚠️
...Invocations/Invocations/AccumulateInvocation.swift	0.00%	37 Missing ⚠️
...ces/Blockchain/Validator/GuaranteeingService.swift	0.00%	15 Missing ⚠️
...ockchain/RuntimeProtocols/ActivityStatistics.swift	33.33%	12 Missing ⚠️
...ockchain/Sources/Blockchain/Types/Statistics.swift	78.57%	12 Missing ⚠️
...vocations/Invocations/IsAuthorizedInvocation.swift	0.00%	12 Missing ⚠️
...lockchain/Sources/Blockchain/State/StateKeys.swift	62.06%	11 Missing ⚠️
... and 16 more

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #334      +/-   ##
==========================================
- Coverage   86.88%   79.71%   -7.17%     
==========================================
  Files         350      361      +11     
  Lines       29954    30807     +853     
==========================================
- Hits        26025    24558    -1467     
- Misses       3929     6249    +2320     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.