* clean up utils
* more cleanup
* remove client.sign
* remove unneeded tests
* remove unneeded infra
* move helper functions to separate files
* fix linter issues
* more cleanup
* make helper functions more generally useful
* fix test account funding
* add import note to README
* lint browser tests
* run eslint --fix
* sets up linting config and runs `yarn lint --fix` once, so that all changes will show up correctly in future PRs.
* Note that there are still a lot of linter errors.