Use node-fetch v3 beta and require Node.js 10.16 (#19)

Co-authored-by: Sindre Sorhus <sindresorhus@gmail.com>
Co-authored-by: Seth Holladay <me@seth-holladay.com>

.travis.yml

@@ -1,4 +1,5 @@
 language: node_js
 node_js:
+  - '14'
+  - '12'
   - '10'
-  - '8'

index.js

@@ -2,8 +2,10 @@
 const fetch = require('node-fetch');
 const AbortController = require('abort-controller');
 
+const TEN_MEGABYTES = 1000 * 1000 * 10;
+
 if (!global.fetch) {
-	global.fetch = fetch;
+	global.fetch = (url, options) => fetch(url, {highWaterMark: TEN_MEGABYTES, ...options});
 }
 
 if (!global.Headers) {

package.json

@@ -11,7 +11,7 @@
 		"url": "sindresorhus.com"
 	},
 	"engines": {
-		"node": ">=10"
+		"node": ">=10.16"
 	},
 	"scripts": {
 		"test": "xo && ava"
@@ -54,7 +54,7 @@
 	],
 	"dependencies": {
 		"abort-controller": "^3.0.0",
-		"node-fetch": "^2.6.0"
+		"node-fetch": "^3.0.0-beta.6-exportfix"
 	},
 	"devDependencies": {
 		"ava": "^2.4.0",

readme.md

@@ -52,7 +52,7 @@ const ky = require('ky-universal');
 	const {body} = await ky('https://httpbin.org/bytes/16');
 	const {value} = await body.getReader().read();
 	const result = new TextDecoder('utf-8').decode(value);
-	
+
 	// …
 })();
 ```
@@ -95,6 +95,25 @@ Put the following in package.json:
 
 The library that uses Ky will now *just work* in AVA tests.
 
+#### `clone()` hangs with a large response in Node - What should I do?
+
+Streams in Node.js have a smaller internal buffer size (16 kB, aka `highWaterMark`) than browsers (>1 MB, not consistent across browsers). When using Ky, the default `highWaterMark` is set to 10 MB, so you shouldn't encounter many issues related to that.
+
+However, you can specify a custom `highWaterMark` if needed:
+
+```js
+import ky from 'ky-universal';
+
+(async () => {
+	const response = await ky('https://example.com', {
+		// 20 MB
+		highWaterMark: 1000 * 1000 * 20
+	});
+
+	const data = await response.clone().buffer();
+})();
+```
+
 ## Related
 
 - [ky](https://github.com/sindresorhus/ky) - Tiny and elegant HTTP client based on the browser Fetch API