chore: adjust sample

fix: unshift volumes instead of adding them in

fix: releaserc fallback, extra comma

fix: missing await calls

fix: docker push cmd

chore: update deps

fix: shells -> execa remnants

fix: docker build args parsing, rm --squash

feat: esm-only, drop bluebird, shelljs, yarn (#64)

BREAKING CHANGE: drops usage of mentioned dependencies, only distributes as ESM.
Introduces cosmicconfig to be able to read more configuration formats. This can
still be used in CJS project as it is self-contained. However, projects using
chrome helpers may have issues, auto-install script does less and eventually
should be fully removed. Now accepts uid for test / exec user, resolves it or creates user with that uid and uses it going forward

fix: parsing node version as a string (#63)