Require Node.js 12 and upgrade dependencies

Closes #119
Fixes #118

.github/workflows/main.yml

@@ -10,13 +10,12 @@ jobs:
       fail-fast: false
       matrix:
         node-version:
+          - 16
           - 14
           - 12
-          - 10
-          - 8
     steps:
       - uses: actions/checkout@v2
-      - uses: actions/setup-node@v1
+      - uses: actions/setup-node@v2
         with:
           node-version: ${{ matrix.node-version }}
       - run: npm install

license

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) Sindre Sorhus <sindresorhus@gmail.com> (sindresorhus.com)
+Copyright (c) Sindre Sorhus <sindresorhus@gmail.com> (https://sindresorhus.com)
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 

package.json

@@ -7,10 +7,10 @@
 	"author": {
 		"name": "Sindre Sorhus",
 		"email": "sindresorhus@gmail.com",
-		"url": "sindresorhus.com"
+		"url": "https://sindresorhus.com"
 	},
 	"engines": {
-		"node": ">=8"
+		"node": ">=12"
 	},
 	"scripts": {
 		"test": "xo && ava"
@@ -30,19 +30,19 @@
 		"postcss-runner"
 	],
 	"dependencies": {
-		"autoprefixer": "^9.6.1",
-		"fancy-log": "^1.3.2",
+		"autoprefixer": "^10.2.6",
+		"fancy-log": "^1.3.3",
 		"plugin-error": "^1.0.1",
-		"postcss": "^7.0.17",
-		"through2": "^3.0.1",
+		"postcss": "^8.3.0",
+		"through2": "^4.0.2",
 		"vinyl-sourcemaps-apply": "^0.2.1"
 	},
 	"devDependencies": {
-		"ava": "^2.3.0",
-		"gulp-sourcemaps": "^2.6.0",
-		"p-event": "^4.1.0",
-		"vinyl": "^2.1.0",
-		"xo": "^0.24.0"
+		"ava": "^2.4.0",
+		"gulp-sourcemaps": "^3.0.0",
+		"p-event": "^4.2.0",
+		"vinyl": "^2.2.1",
+		"xo": "^0.39.0"
 	},
 	"peerDependencies": {
 		"gulp": ">=4"

readme.md

@@ -4,14 +4,12 @@
 
 *Issues with the output should be reported on the Autoprefixer [issue tracker](https://github.com/postcss/autoprefixer/issues).*
 
-
 ## Install
 
 ```
 $ npm install --save-dev gulp-autoprefixer
 ```
 
-
 ## Usage
 
 ```js
@@ -27,7 +25,6 @@ exports.default = () => (
 );
 ```
 
-
 ## API
 
 ### autoprefixer(options?)
@@ -38,7 +35,6 @@ Type: `object`
 
 See the Autoprefixer [options](https://github.com/postcss/autoprefixer#options).
 
-
 ## Source Maps
 
 Use [gulp-sourcemaps](https://github.com/gulp-sourcemaps/gulp-sourcemaps) like this:
@@ -59,7 +55,6 @@ exports.default = () => (
 );
 ```
 
-
 ## Tip
 
 If you use other PostCSS based tools, like `cssnano`, you may want to run them together using [`gulp-postcss`](https://github.com/postcss/autoprefixer#gulp) instead of `gulp-autoprefixer`. It will be faster, as the CSS is parsed only once for all PostCSS based tools, including Autoprefixer.

test.js

@@ -17,7 +17,7 @@ test('autoprefix CSS', async t => {
 	}));
 
 	const file = await data;
-	t.true(/-/.test(file.contents.toString()));
+	t.regex(file.contents.toString(), /-/);
 	t.is(file.relative, 'fixture.css');
 });
 
@@ -43,8 +43,8 @@ test('generate source maps', async t => {
 	const file = await data;
 	t.is(file.sourceMap.mappings, 'AAAA;CACC,aAAa;AACd');
 	const contents = file.contents.toString();
-	t.true(/flex/.test(contents));
-	t.true(/sourceMappingURL=data:application\/json;charset=utf8;base64/.test(contents));
+	t.regex(contents, /flex/);
+	t.regex(contents, /sourceMappingURL=data:application\/json;charset=utf8;base64/);
 });
 
 test('read upstream source maps', async t => {