Update useSet docs

docs/useSet.md

@@ -4,16 +4,22 @@ React state hook that tracks a [Set](https://developer.mozilla.org/en-US/docs/We
 
 ## Usage
 
+What is the difference between the "clear()" method and the "reset()" method?
+
+The "reset()" method returns the "Set" to the initial value passed during "useSet
+The "clear()" method completely empties the "Set".
+
 ```jsx
 import {useSet} from 'react-use';
 
 const Demo = () => {
-  const [set, { add, has, remove, toggle, reset }] = useSet(new Set(['hello']));
+  const [set, { add, has, remove, toggle, reset, clear }] = useSet(new Set(['hello']));
 
   return (
     <div>
       <button onClick={() => add(String(Date.now()))}>Add</button>
       <button onClick={() => reset()}>Reset</button>
+      <button onClick={() => clear()}>Clear</button>
       <button onClick={() => remove('hello')} disabled={!has('hello')}>
         Remove 'hello'
       </button>

stories/useSet.story.tsx

@@ -4,12 +4,13 @@ import { useSet } from '../src';
 import ShowDocs from './util/ShowDocs';
 
 const Demo = () => {
-  const [set, { add, has, remove, reset, toggle }] = useSet(new Set(['hello']));
+  const [set, { add, has, remove, reset, clear, toggle }] = useSet(new Set(['hello']));
 
   return (
     <div>
       <button onClick={() => add(String(Date.now()))}>Add</button>
       <button onClick={() => reset()}>Reset</button>
+      <button onClick={() => clear()}>Clear</button>
       <button onClick={() => remove('hello')} disabled={!has('hello')}>
         Remove 'hello'
       </button>