Bump benchmark 1.6.1

[AndreaLanfranchi]

No description provided.

[canepat]

Build failed in AppVeyor with message Build exceeded allowed resource quotas. I am wondering if this is strictly related to this version bump.

[yperbasis]

I've purged AppVeyor Hunter cache and restarted the build. Let's see what happens.

[canepat]

I've purged AppVeyor Hunter cache and restarted the build. Let's see what happens.

Thanks. How do you purge AppVeyor Hunter cache? Is it an administrative operation from the Silkworm account in AppVeyor?

[yperbasis]

I've purged AppVeyor Hunter cache and restarted the build. Let's see what happens.

Thanks. How do you purge AppVeyor Hunter cache? Is it an administrative operation from the Silkworm account in AppVeyor?

I send the following REST API request:

DELETE https://ci.appveyor.com/api/projects/torquem/silkworm/buildcache

(with an authorization Header of course)

[codecov]

Codecov Report

Merging #616 (e59b19d) into master (446d1e3) will decrease coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #616      +/-   ##
==========================================
- Coverage   81.65%   81.64%   -0.02%     
==========================================
  Files         167      167              
  Lines       13925    13925              
==========================================
- Hits        11371    11369       -2     
- Misses       2554     2556       +2     

Impacted Files	Coverage Δ
core/silkworm/state/in_memory_state.cpp	94.14% <0.00%> (-0.98%)	⬇️

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