made return value not nullable, fixed sequence of keys in events, removed AI text from readme

README.md

@@ -1,7 +1,7 @@
 # hyperf-keybinds
 
-Quickly handle keyboard shortcuts and sequences in your app.
-
+Handle keybind sequences in your app.
+You can have branches of sequences, the only restriction being that one sequence cannot be a strict subset of another.
 ## Install
 
 ```bash
@@ -11,23 +11,30 @@ npm install hyperf-keybinds
 ## Quick Start
 
 ```ts
-import { createKeyHandler, KeybindEventTypes, ModifierKey } from 'hyperf-keybinds';
+import { createKeyHandler, ModifierKey, KeybindEvent} from 'hyperf-keybinds';
 
-// Define a command
+// Define commands
 const commands = [
   { command: [{ key: 'KeyS', modifiers: [ModifierKey.Control] }], callback: () => console.log('Ctrl+S!') },
   { command: [{ key: 'KeyA', modifiers: []}, { key: 'KeyS', modifiers: []}], callback: () => console.log('a - s!')}
 ];
 
-// Create handler and emitter
-const { handler, emitter } = createKeyHandler(commands);
+// Create handler
+const {handler, emitter, success} = createKeyHandler(commands, 5000);
 
-// Attach to window
-window.addEventListener('keydown', handler);
+// Success is false if you provided invalid sequences.
+if (success)
+{
+  window.addEventListener('keydown', handler);
+
+  // Listen to events
+  emitter.on((event : KeybindEvent)  => console.log(event.type, event));
+}
 
-// Listen to events
-emitter.on(e => console.log(e.type));
 ```
 
 Now Ctrl+S triggers your callback and emits events.
 Pressing a then s triggers a separate callback.
+Timeout (default 5000) can be observed by just pressing key A.
+
+Key codes can be looked up here: https://developer.mozilla.org/en-US/docs/Web/API/UI_Events/Keyboard_event_code_values