Require Node.js 8

Closes #29

.travis.yml

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

index.d.ts

@@ -3,7 +3,7 @@ Strip [ANSI escape codes](https://en.wikipedia.org/wiki/ANSI_escape_code) from a
 
 @example
 ```
-import stripAnsi from 'strip-ansi';
+import stripAnsi = require('strip-ansi');
 
 stripAnsi('\u001B[4mUnicorn\u001B[0m');
 //=> 'Unicorn'
@@ -12,4 +12,6 @@ stripAnsi('\u001B]8;;https://github.com\u0007Click\u001B]8;;\u0007');
 //=> 'Click'
 ```
 */
-export default function stripAnsi(string: string): string;
+declare function stripAnsi(string: string): string;
+
+export = stripAnsi;

index.js

@@ -1,7 +1,4 @@
 'use strict';
 const ansiRegex = require('ansi-regex');
 
-const stripAnsi = string => typeof string === 'string' ? string.replace(ansiRegex(), '') : string;
-
-module.exports = stripAnsi;
-module.exports.default = stripAnsi;
+module.exports = string => typeof string === 'string' ? string.replace(ansiRegex(), '') : string;

index.test-d.ts

@@ -1,4 +1,4 @@
-import {expectType} from 'tsd-check';
-import stripAnsi from '.';
+import {expectType} from 'tsd';
+import stripAnsi = require('.');
 
 expectType<string>(stripAnsi('\u001B[4mcake\u001B[0m'));

package.json

@@ -10,10 +10,10 @@
 		"url": "sindresorhus.com"
 	},
 	"engines": {
-		"node": ">=6"
+		"node": ">=8"
 	},
 	"scripts": {
-		"test": "xo && ava && tsd-check"
+		"test": "xo && ava && tsd"
 	},
 	"files": [
 		"index.js",
@@ -44,11 +44,11 @@
 		"text"
 	],
 	"dependencies": {
-		"ansi-regex": "^4.1.0"
+		"ansi-regex": "^5.0.0"
 	},
 	"devDependencies": {
-		"ava": "^1.3.1",
-		"tsd-check": "^0.5.0",
-		"xo": "^0.24.0"
+		"ava": "^2.4.0",
+		"tsd": "^0.10.0",
+		"xo": "^0.25.3"
 	}
 }