transformer is renaming .json files to .json.cjs

The transformer is renaming .json files that it is not supposed to. EG: 

```ts
import users from './users.json'
```

the result comes as 

```js
import users from './users.json.cjs'
```

the expected result is that it shouldn't touch anything that is not js.

```js
import users from './users.json'
```

and on top of that the file doesn't exist in the dist dir.