Using spread on an object method generates breaking syntax

Here's a minimal representation of the original code, which works well on the browser:

```js
const foo = { bar: [] }
const baz = true ? [1,2,3] : []
foo.bar.push(...baz)

// [1,2,3]
console.log(foo.bar)
```

When transpiled, the entire push operation appears to be ignored.

```js
var foo = { bar: [] }
var baz = true ? [1,2,3] : []
(ref = foo.bar).push.apply(ref, [1,2,3])

// []
console.log(foo.bar)
var ref;
```

The current workaround is to add `;` at the end of the ternary, breaking off the second and third line:

```js
const foo = { bar: [] }
const baz = true ? [1,2,3] : [];
foo.bar.push(...baz)

// [1,2,3]
console.log(foo.bar)
```

Buble should automatically add the `;` because it added the parens. The consumer should not be aware about adding `;` due to implementation, especially when the code works without it before transpilation.