Strip interpolation

[Leko]

Minimum reproducible text

{
  "ja": {
    "x": "{browser}ブラウザ"
  }
}

Minimum reproducible Textlint config

{
  "rules": {
    "@textlint-ja/no-synonyms": {
      "allowAlphabet": false
    }
  },
  "plugins": {
    "textlint-plugin-vue-i18n": {
      "locales": ["ja"]
    }
  }
}

(Unexpected) Error

error  同義語である「browser」と「ブラウザ」が利用されています       @textlint-ja/no-synonyms

Expected behavior

No error

[Leko]

Currently, we recognize {browser} as text. We must ignore the syntax even if there's a textlint error in it as to fix the error may lead to a bug.