Fix usage example

index.d.ts

@@ -7,22 +7,25 @@ Check if a Buffer/Uint8Array is a [PNG](https://en.wikipedia.org/wiki/Portable_N
 @example
 ```
 // Node.js:
-import readChunk from 'read-chunk';
+import {readChunk} from 'read-chunk';
 import isPng from 'is-png';
 
-const buffer = readChunk.sync('unicorn.png', 0, 8);
+const buffer = await readChunk('unicorn.png', {length: 8});
 
 isPng(buffer);
 //=> true
+```
 
-// Browser:
-import readChunk from 'read-chunk';
+@example
+```
+import isPng from 'is-png';
 
+// Browser:
 const response = await fetch('unicorn.png');
 const buffer = await response.arrayBuffer();
 
 isPng(new Uint8Array(buffer));
 //=> true
 ```
 */
-export default function isPng(buffer: Uint8Array | Buffer): boolean;
+export default function isPng(buffer: Uint8Array): boolean;

index.js

@@ -3,14 +3,12 @@ export default function isPng(buffer) {
 		return false;
 	}
 
-	return (
-		buffer[0] === 0x89 &&
-		buffer[1] === 0x50 &&
-		buffer[2] === 0x4E &&
-		buffer[3] === 0x47 &&
-		buffer[4] === 0x0D &&
-		buffer[5] === 0x0A &&
-		buffer[6] === 0x1A &&
-		buffer[7] === 0x0A
-	);
+	return buffer[0] === 0x89
+		&& buffer[1] === 0x50
+		&& buffer[2] === 0x4E
+		&& buffer[3] === 0x47
+		&& buffer[4] === 0x0D
+		&& buffer[5] === 0x0A
+		&& buffer[6] === 0x1A
+		&& buffer[7] === 0x0A;
 }

index.test-d.ts

@@ -1,4 +1,4 @@
-/// <reference lib="dom"/>
+import {Buffer} from 'node:buffer';
 import {expectType} from 'tsd';
 import isPng from './index.js';
 

package.json

@@ -40,10 +40,10 @@
 		"uint8array"
 	],
 	"devDependencies": {
-		"@types/node": "^14.14.41",
+		"@types/node": "^16.7.10",
 		"ava": "^3.15.0",
-		"read-chunk": "^3.2.0",
-		"tsd": "^0.14.0",
-		"xo": "^0.38.2"
+		"read-chunk": "^4.0.1",
+		"tsd": "^0.17.0",
+		"xo": "^0.44.0"
 	}
 }

readme.md

@@ -13,10 +13,10 @@ $ npm install is-png
 ##### Node.js
 
 ```js
-import readChunk from 'read-chunk'; // npm install read-chunk
+import {readChunk} from 'read-chunk';
 import isPng from 'is-png';
 
-const buffer = readChunk.sync('unicorn.png', 0, 8);
+const buffer = await readChunk('unicorn.png', {length: 8});
 
 isPng(buffer);
 //=> true

test.js

@@ -1,8 +1,8 @@
 import test from 'ava';
-import readChunk from 'read-chunk';
+import {readChunkSync} from 'read-chunk';
 import isPng from './index.js';
 
-const check = filename => isPng(readChunk.sync(filename, 0, 8));
+const check = filename => isPng(readChunkSync(filename, {length: 8}));
 
 test('main', t => {
 	t.true(check('fixture.png'));