method save

save() {
  const params = new FormData()
  const testimonial = this.testimonial

  for (const field in testimonial) {
    params.append(field, testimonial[field])
  }

  const request = this.id
    ? this.$axios.put(`${this.loadUrl}/${this.id}`, params)
    : this.$axios.post(this.loadUrl, params)

  request
    .then(({ status }) => {
      if (Number(status) === 200) this.success = 'Отзыв успешно обновлён'
      if (Number(status) === 201) this.success = 'Отзыв успешно добавлен'
      setTimeout(() => {
        this.$router.push('/testimonials/')
      }, 1000)
    })
    .catch(error => {
      this.error = error + ''
    })
}