Intercom API should take a method name and an object, not array.

In [src/intercomAPI.ts](https://github.com/nhagen/react-intercom/blob/bb9c20269ea61a28a1065c46badeb6a8c73d64ea/src/intercomAPI.ts#L3) on branch `2.0`, `args` should be an `object`, not an `array`.

Just change line 1 from:
```
export default function(method: string, ...args: Array<any>) {
```
to:
```
export default function(method: string, args: any) {
```