Require Node.js 10 (#20)

.travis.yml

@@ -1,5 +1,5 @@
 language: node_js
 node_js:
+  - '14'
+  - '12'
   - '10'
-  - '8'
-  - '6'

index.d.ts

@@ -6,6 +6,11 @@ declare namespace gzipSize {
 	type Options = ZlibOptions;
 
 	interface GzipSizeStream extends stream.PassThrough {
+		/**
+		Contains the gzip size of the stream after it is finished. Since this happens asynchronously, it is recommended you use the `gzip-size` event instead.
+		*/
+		gzipSize?: number;
+
 		addListener(event: 'gzip-size', listener: (size: number) => void): this;
 		addListener(
 			event: string | symbol,
@@ -37,11 +42,6 @@ declare namespace gzipSize {
 			event: string | symbol,
 			listener: (...args: any[]) => void
 		): this;
-
-		/**
-		Contains the gzip size of the stream after it is finished. Since this happens asynchronously, it is recommended you use the `gzip-size` event instead.
-		*/
-		gzipSize?: number;
 	}
 }
 

index.js

@@ -2,17 +2,19 @@
 const fs = require('fs');
 const stream = require('stream');
 const zlib = require('zlib');
+const {promisify} = require('util');
 const duplexer = require('duplexer');
-const pify = require('pify');
 
-const getOptions = options => Object.assign({level: 9}, options);
+const getOptions = options => ({level: 9, ...options});
+const gzip = promisify(zlib.gzip);
 
-module.exports = (input, options) => {
+module.exports = async (input, options) => {
 	if (!input) {
-		return Promise.resolve(0);
+		return 0;
 	}
 
-	return pify(zlib.gzip)(input, getOptions(options)).then(data => data.length).catch(_ => 0);
+	const data = await gzip(input, getOptions(options));
+	return data.length;
 };
 
 module.exports.sync = (input, options) => zlib.gzipSync(input, getOptions(options)).length;

package.json

@@ -10,7 +10,7 @@
 		"url": "sindresorhus.com"
 	},
 	"engines": {
-		"node": ">=6"
+		"node": ">=10"
 	},
 	"scripts": {
 		"test": "xo && ava && tsd"
@@ -30,13 +30,12 @@
 		"buffer"
 	],
 	"dependencies": {
-		"duplexer": "^0.1.1",
-		"pify": "^4.0.1"
+		"duplexer": "^0.1.1"
 	},
 	"devDependencies": {
-		"ava": "^1.4.1",
-		"p-event": "^2.1.0",
-		"tsd": "^0.7.2",
-		"xo": "^0.24.0"
+		"ava": "^2.4.0",
+		"p-event": "^4.2.0",
+		"tsd": "^0.13.1",
+		"xo": "^0.34.2"
 	}
 }