ci: Run execution-spec-tests

[chfast]

• Upgrade ethereum/tests to v13.
• Download and run execution-spec-tests (v1.0.6).

[codecov]

Codecov Report

Merging #737 (8cf6d94) into master (d78b935) will increase coverage by 0.04%.
The diff coverage is n/a.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #737      +/-   ##
==========================================
+ Coverage   97.79%   97.84%   +0.04%     
==========================================
  Files         109      109              
  Lines       10303    10303              
==========================================
+ Hits        10076    10081       +5     
+ Misses        227      222       -5     

Flag	Coverage Δ
blockchaintests	60.79% <ø> (ø)
statetests	61.93% <ø> (+1.09%)	⬆️
statetests-silkpre	26.27% <ø> (ø)
unittests	95.90% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

see 1 file with indirect coverage changes