Expose KeyPressEvent in key_binding/__init__.py

This is often used in type annotations.

Author: jonathanslenders

prompt_toolkit/key_binding/__init__.py

@@ -5,13 +5,16 @@
     KeyBindingsBase,
     merge_key_bindings,
 )
-from .key_processor import KeyPress
+from .key_processor import KeyPress, KeyPressEvent
 
 __all__ = [
+    # key_bindings.
     "ConditionalKeyBindings",
     "DynamicKeyBindings",
     "KeyBindings",
     "KeyBindingsBase",
     "merge_key_bindings",
+    # key_processor
     "KeyPress",
+    "KeyPressEvent",
 ]