为什么拼音里有a的会有问题呢？

[xcapis]

PHP7.3.1 nginx 使用composer require "overtrue/pinyin:~4.0"进行安装 代码如下 ` require(dirname(FILE) . '/vendor/autoload.php');

use Overtrue\Pinyin\Pinyin;

$pinyin = new Pinyin();

$a = $pinyin->convert('带着希望去旅行，比到达终点更美好');

print_r($a); ` 输出以下内容

Array ( [0] => d� [1] => i [2] => zhe [3] => xi [4] => w� [5] => ng [6] => qu [7] => lyu [8] => xing [9] => bi [10] => d� [11] => o [12] => da [13] => zhong [14] => dian [15] => geng [16] => mei [17] => hao )

经测试，不管是abbr还是convert。前面几个有问题的都有问题

[AlexStack]

Same issue, 澳佳宝 儿童益生菌 30袋 �-o-jia-bao-er-tong-yi-sheng-jun-30-d�-i

[weimasi]

我刚也遇到了这个问题，所有带有a的拼音都转不了，退回到3.0版本没问题！

[overtrue]

已修复 #119