chore: bump sor to 4.0.0 - feat(breaking): top-level alpha router native currencyIn, currencyIn, quoteCurrency support

[jsy1218]

Release https://github.com/Uniswap/smart-order-router/pull/721.

I ran all the e2e tests against local routing-api instance, and saw that the cached routes hit rate is still significantly higher than miss rate, which gives me the confidence the change is working as expected: