Fix cached database

[lupin012]

[codecov[bot]]

Codecov Report

Merging #392 (acfb2ff) into master (24df505) will increase coverage by 0.05%. The diff coverage is 86.20%.

@@            Coverage Diff             @@
##           master     #392      +/-   ##
==========================================
+ Coverage   81.82%   81.88%   +0.05%     
==========================================
  Files         106      106              
  Lines        6745     6745              
  Branches     1313     1311       -2     
==========================================
+ Hits         5519     5523       +4     
+ Misses        752      751       -1     
+ Partials      474      471       -3     

Impacted Files	Coverage Δ
silkrpc/ethdb/kv/cached_database.cpp	89.65% <72.72%> (+10.24%)	:arrow_up:
silkrpc/core/evm_trace.cpp	72.31% <90.00%> (+0.06%)	:arrow_up:
silkrpc/core/evm_debug.cpp	73.54% <100.00%> (+0.20%)	:arrow_up:
silkrpc/core/evm_executor.cpp	85.40% <100.00%> (ø)
silkrpc/core/evm_executor.hpp	100.00% <100.00%> (ø)

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