Constructing a relative pathname on Windows is problematic because the
two absolute pathnames might be on different drives (or UNC paths).
Use `path.resolve()` instead of `path.join()` where appropriate to
avoid the need to construct a relative path.
Normally I would let `eslint --fix` do this for me, but there's a bug
that causes:
const x = function ()
{
// ...
};
to become:
const x = ()
=> {
// ...
};
which ESLint thinks is a syntax error. (It probably is; I don't know
enough about the automatic semicolon insertion rules to be confident.)
