Update all require('util/') to be `require('util') because the trailing slash isn't needed

[sstchur]

While working on a project using a new bundler, we discovered that the presence of the trailing slash is breaking the bundler. Since that trailing slash isn't needed, I'm proposing removing it from all require('util') statements.

[ljharb]

The trailing slash is absolutely needed - without the slash, it's the core module, with it, it's the util package from npm.

If that's breaking your bundler, then your bundler is broken.