"npm audit" started whining about moderate denial of service
vulnerability in a dependency of dependency of dependency
(eslint > espree > acorn). This is not really serious because
we use "eslint" only for development. However, red builds are not good
so bump the pinned version in package.lock. (Released versions are not
affected because they do not include eslint.)
It's not like we need any new features, but let's bump the versions
because we are in JavaScript land.
Also, run "npm audit" regularly, just in case a serious vulnerability
is discovered.
Now that I know how to write some simple action, let's make a stub
more complete. For example, I already know what inputs I would like
to handle for this action.