I've root-caused three problems getting the example to work, but I don't know how to fix

1. Webpack schema no longer allows preLoaders so errors out. The member is populated with an empty array, so it can be deleted. I worked around this one by adding

`delete module.exports.module.preLoaders`

to `webpack.config.server.js' but it should be fixed elsewhere. Where?

2. `.plugin("webpack.ProvidePlugin", { React: "react" })` in
`webpack.config.defaults.js` gives a *non-fatal* error at line 306 in `tapable.js`

`arguments[i].apply(this);`

In the debugger, if I execute the line twice, it does not give an error the second time.

```
Debugger listening on [::]:40736
webpack: Using compiler.parser is deprecated.
Use compiler.plugin("compilation", function(compilation, data) {
data.normalModuleFactory.plugin("parser", function(parser, options) { parser.plugin(/* ... */); });
}); instead. It was called at ProvidePlugin. (/home/mwolf/tools/terse-webpack/example/node_modules/@terse/webpack/node_modules/webpack/lib/ProvidePlugin.js:30:19).
```

3. At the same location, when trying to bind `Plugin {name: "npm-install-webpack-plugin", args: Array[0]}`
It throws a fatal error:

`TypeError: Cannot read property 'plugin' of null`

The error comes from `plugins.js` , function `NpmInstallPlugin.prototype.apply`

The statements

```
compiler.resolvers.loader.plugin("module", this.resolveLoader.bind(this));

// Install project dependencies on demand
compiler.resolvers.normal.plugin("module", this.resolveModule.bind(this));
```
Both fail because the resolvers member for this plugin is:

`Object {normal: null, loader: null, context: null}`

I'm willing to prepare a PR if you advise me how and where to fix. I think it's a great idea, and I want to suport it.