"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.
Well, it seems the environment is changing so we'd better run the tests
reguarly to see whether something breaks in a timely manner.
GitHub Actions also don't offer other Windows environments now, only
windows-latest is available. Reduce test matrix to only that.
Try compiling some C code, If it works then we're probably fine.
I don't even try to verify cross-compilation because I don't need it.
It should work, but that's not my problem right now.
Again, this is a squashed commit with around three hours of attempts
to write something working. See comments in the file for more details.
I'm too lazy to document this stuff properly.
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.
ilammy