Can't make Haul to work together with Realm

### Current Behavior
Compiling fails.

### Expected Behavior
To compile.

### Haul Configuration (webpack.haul.js)
Default.

### Your Environment

| software | version
| ---------------- | -------
| Haul | 1.0.0-beta.13
| react-native | 0.50.3
| node | 8.4.0
| yarn | 1.5.1
| realm | 2.2.13

Stacktrace:

```
./node_modules/realm/lib/index.js
102:27-55 Critical dependency: the request of a dependency is an expression
at CommonJsRequireContextDependency.getWarnings (/Users/ferrannp/Development/Projects/ReactNative/Showman/node_modules/webpack/lib/dependencies/ContextDependency.js:39:18)
at Compilation.reportDependencyErrorsAndWarnings (/Users/ferrannp/Development/Projects/ReactNative/Showman/node_modules/webpack/lib/Compilation.js:703:24)
at Compilation.finish (/Users/ferrannp/Development/Projects/ReactNative/Showman/node_modules/webpack/lib/Compilation.js:561:9)
at applyPluginsParallel.err (/Users/ferrannp/Development/Projects/ReactNative/Showman/node_modules/webpack/lib/Compiler.js:506:17)
at /Users/ferrannp/Development/Projects/ReactNative/Showman/node_modules/tapable/lib/Tapable.js:289:11
at _addModuleChain (/Users/ferrannp/Development/Projects/ReactNative/Showman/node_modules/webpack/lib/Compilation.js:507:11)
at processModuleDependencies.err (/Users/ferrannp/Development/Projects/ReactNative/Showman/node_modules/webpack/lib/Compilation.js:477:14)
at _combinedTickCallback (internal/process/next_tick.js:131:7)
at process._tickCallback (internal/process/next_tick.js:180:9)
@ ./node_modules/realm/lib/index.js
@ ./src/database/index.js
@ ./src/root.js
@ ./src/index.js
@ ./index.ios.js
@ multi ./node_modules/haul/src/utils/polyfillEnvironment.js ./index.ios.js
```