`argument` throws `desc is undefined`

`import { argument } from '@ember-decorators/argument';`

```
class ProjectFormComponent extends Component {
@argument
model;
}
```

throws:
```
TypeError: desc is undefined[Learn More] index.js:33

internalArgumentDecorator2Ember

decorateElement decorate.js:118 decorateClass decorate.js:83 forEach (index):262 decorateClass decorate.js:81 _decorate decorate.js:21 project-form.js:8 exports loader.js:106 requireModule loader.js:27 _extractDefaultExport18Ember
compile opcode-compiler.js:423 compileInline opcode-compiler.js:943 compileInline opcode-compiler.js:1509 statementCompiler opcode-compiler.js:192 compile opcode-compiler.js:47 compile opcode-compiler.js:745 add opcode-compiler.js:952 compile opcode-compiler.js:692 getLayout Ember runtime.js:1723 evaluate runtime.js:72 evaluateSyscall runtime.js:3471 evaluateInner runtime.js:3417 evaluateOuter runtime.js:3409 next runtime.js:5530 next runtime.js:5632 render2Ember
runInTransaction (index):976 _renderRoots5Ember
invoke backburner.js:333 flush backburner.js:223 flush backburner.js:427 _end backburner.js:1003 end backburner.js:689 _run backburner.js:1056 _join backburner.js:1030 join backburner.js:749 join2Ember
mightThrow2jQuery
```

Removing the argument decorator gets rid of the problem...