Add missing imports

Author: stfnkth

src/openlayers/controls.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from .models.controls import (
     Control,
     ControlT,

src/openlayers/layers.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from .models.layers import (
     Layer,
     LayerT,

src/openlayers/map_options.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from .models.map_options import MapOptions
 
 __all__ = ["MapOptions"]

src/openlayers/sources.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from .models.sources import (
     OSM,
     GeoTIFFSource,

src/openlayers/view.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from .models.view import Projection, View
 
 __all__ = ["Projection", "View"]