genesis: reset proxima to start from stdlib v9

[nanne007]

No description provided.

[codecov]

Codecov Report

Merging #3086 (7051f92) into master (e87fc49) will decrease coverage by 0.14%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #3086      +/-   ##
==========================================
- Coverage   33.19%   33.06%   -0.13%     
==========================================
  Files         518      518              
  Lines       46710    46710              
  Branches    21364    21379      +15     
==========================================
- Hits        15502    15440      -62     
+ Misses      16595    16582      -13     
- Partials    14613    14688      +75     

Flag	Coverage Δ
unittests	33.06% <100.00%> (-0.13%)	⬇️

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Impacted Files	Coverage Δ
config/src/genesis_config.rs	52.46% <100.00%> (ø)
network-p2p/src/peer_info.rs	43.55% <0.00%> (-5.91%)	⬇️
commons/accumulator/src/tree.rs	52.69% <0.00%> (-4.87%)	⬇️
types/src/startup_info.rs	64.23% <0.00%> (-4.58%)	⬇️
vm/natives/src/vector.rs	16.67% <0.00%> (-4.16%)	⬇️
executor/src/executor.rs	54.17% <0.00%> (-4.16%)	⬇️
vm/functional-tests/src/checker/directives.rs	51.93% <0.00%> (-3.84%)	⬇️
.../types/src/on_chain_config/genesis_gas_schedule.rs	14.65% <0.00%> (-3.53%)	⬇️
network-rpc/src/lib.rs	26.67% <0.00%> (-3.33%)	⬇️
chain/open-block/src/lib.rs	33.12% <0.00%> (-3.24%)	⬇️
... and 81 more

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