* fix: avoid json named imports

This is required by webpack 5, and is done to keep the widgets library compatible.
See https://webpack.js.org/migrate/5/#using-named-exports-from-json-modules

Note that this must be done upstream as well, in @uniswap/v3-sdk and @uniswap/router-sdk.

* chore: bump v3-sdk to avoid json named imports