no semi style bug

Input:

```js
const oneObj = {
arr: []
}
oneObj.arr.push(...[1,2,3])
```

Output:

```js
var ref;
var oneObj = {
arr: []
}
(ref = oneObj.arr).push.apply(ref, [1,2,3])
```

Should be:

```js
var ref;
var oneObj = {
arr: []
}; // <--
(ref = oneObj.arr).push.apply(ref, [1,2,3])
```

Start by running the provided JavaScript input through Buble and compare the generated output with the expected output. Trace the transformation responsible for converting the object and spread call, then verify that the generated object assignment receives the missing semicolon without changing the surrounding output.

Written by the indexing model from the issue text.