build(deps): bump async from 2.6.1 to 2.6.4 (#60)
build(deps): bump async from 2.6.1 to 2.6.4 (#60)

Co-authored-by: dependabot[bot] <1c358da00a777d4e9898c1280ab801e2df165188@users.noreply.github.com>
SimenB/bowser-cache