Upgrade intx to v0.11.0

[chfast]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.29%. Comparing base (ef33f49) to head (6562919).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #967      +/-   ##
==========================================
- Coverage   94.29%   94.29%   -0.01%     
==========================================
  Files         143      143              
  Lines       16129    16128       -1     
==========================================
- Hits        15209    15208       -1     
  Misses        920      920              

Flag	Coverage Δ
eof_execution_spec_tests	16.86% <0.00%> (+<0.01%)	⬆️
ethereum_tests	26.92% <0.00%> (+<0.01%)	⬆️
ethereum_tests_silkpre	18.69% <0.00%> (ø)
execution_spec_tests	17.95% <0.00%> (+<0.01%)	⬆️
unittests	89.72% <100.00%> (-0.01%)	⬇️

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Files	Coverage Δ
test/unittests/evmmax_secp256k1_test.cpp	100.00% <100.00%> (ø)