Support Unicode characters

[effectivecui]

When input unicode characters，the number of input line is not correct. see screenshot below for more details.

Please use string-width@5.1.2 to strip characters instead of the simple strip function in the source code below to compute the width of characters

The path of source code below is lib/util/strip.js

'use strict';

module.exports = str => {
  const pattern = [
    '[\\u001B\\u009B][[\\]()#;?]*(?:(?:(?:(?:;[-a-zA-Z\\d\\/#&.:=?%@~_]+)*|[a-zA-Z\\d]+(?:;[-a-zA-Z\\d\\/#&.:=?%@~_]*)*)?\\u0007)',
    '(?:(?:\\d{1,4}(?:;\\d{0,4})*)?[\\dA-PRZcf-ntqry=><~]))'
  ].join('|');

  const RGX = new RegExp(pattern, 'g');
  return typeof str === 'string' ? str.replace(RGX, '') : str;
};

The changes maybe like this

The path of source code below is lib/util/clear.js

'use strict';

//const strip = require('./strip');
const { erase, cursor } = require('sisteransi');
const stringWidth = require('string-width');

//const width = str => [...strip(str)].length;

/**
 * @param {string} prompt
 * @param {number} perLine
 */
module.exports = function(prompt, perLine) {
  if (!perLine) return erase.line + cursor.to(0);

  let rows = 0;
  const lines = prompt.split(/\r?\n/);
  for (let line of lines) {
    rows += 1 + Math.floor(Math.max(stringWidth(line) - 1, 0) / perLine);
  }

  return erase.lines(rows);
};