Array methods don't work on readonly arrays

Input:
```ts
const array: ReadonlyArray<string> = ['foo'];
array.forEach(() => {});
```

Current Result:
```lua
local array = {"foo"};
array:forEach(function(____)
end);
```

Expected Result:
```lua
local array = {"foo"};
__TS__ArrayForEach(array, function(____)
end);
```