code: public static ShearCaptcha createShearCaptcha(int width, int height, int codeCount, int thickness) {
  		return new ShearCaptcha(width, height, codeCount, thickness);
  	}
docs: 创建扭曲干扰的验证码，默认5位验证码
  
  @param width 图片宽
  @param height 图片高
  @param codeCount 字符个数
  @param thickness 干扰线宽度
  @return {@link ShearCaptcha}
  @since 3.3.0