Usage in the readme is wrong

[jing2si]

import * as React from 'react';
import { useComboKeys } from 'react-combo-keys';

function SearchBar(props: {}) {
    const input = Rwact.useRef();

    useComboKeys({
-        'Mod+F': () => {
+        'mod+f': () => {
            input.current.focus();
        },
-        'Mod+': () => {
+        'mod+s': () => {
            alert('Settings !')
        }
-    }, {}, []);
+    }, []);

    return <input type="text" ref={input} />;
}

BTW
First of all, thank you for this very usefully library.
Is it possible to add an option for disable or enable shortcut by some conditional?