extract strip-ansi dependency

index.js

@@ -1,6 +1,5 @@
-"use strict"
-const stripAnsi = require('strip-ansi')
-const getWCwidth = require('wcwidth')
+const stripAnsi = require('./strip-ansi')
+const getWCwidth = require('./wcwidth')
 
 const {
   padRight,

strip-ansi.js

@@ -0,0 +1,9 @@
+const ansiRegex = require('ansi-regex');
+
+module.exports = function stripAnsi(string) {
+  if (typeof string !== 'string') {
+    throw new TypeError(`Expected a \`string\`, got \`${typeof string}\``);
+  }
+
+  return string.replace(ansiRegex(), '');
+}

utils.js

@@ -1,6 +1,4 @@
-'use strict';
-
-var wcwidth = require('./width');
+const wcwidth = require('./wcwidth');
 
 /**
  * repeat string `str` up to total length of `len`