GTK+ "broken"

When using GTK+ 3.0 you must call `gi.require_version("Gtk", "3.0")` before other imports, like:

```python
import gi
gi.require_version("Gtk", "3.0")

from gi.repository import Gdk, Gtk

builder = Gtk.Builder()
...
```

But importmagic re-arrange the imports broking the semantic:

```python
import gi
from gi.repository import Gdk, Gtk

gi.require_version("Gtk", "3.0")

builder = Gtk.Builder()
...
```

Is that possible to add something to code to disable in these lines? Something like:

```python
# importmagic-ignore-start
import gi
gi.require_version("Gtk", "3.0")
# importmagic-ignore-end

from gi.repository import Gdk, Gtk

builder = Gtk.Builder()
...
```