feat(pool): update best price on base fee change

[dancoombs]

Closes #959

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 59.06%. Comparing base (cbd0734) to head (b519a49).
Report is 1 commits behind head on main.

Additional details and impacted files

Files with missing lines	Coverage Δ
crates/pool/src/mempool/pool.rs	96.95% <100.00%> (+0.23%)	⬆️
crates/pool/src/mempool/uo_pool.rs	92.17% <100.00%> (+0.01%)	⬆️

Flag	Coverage Δ
unit-tests	59.06% <100.00%> (+0.09%)	⬆️

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Components	Coverage Δ
rundler binary	0.00% <ø> (ø)
builder	65.22% <ø> (ø)
dev	∅ <ø> (∅)
pool	66.97% <100.00%> (+0.25%)	⬆️
provider	19.49% <ø> (ø)
rpc	26.45% <ø> (ø)
sim	77.03% <ø> (ø)
tasks	∅ <ø> (∅)
types	67.66% <ø> (ø)
utils	30.06% <ø> (ø)