chore(deps-dev): bump prettier from 1.19.1 to 2.0.1

Bumps [prettier](https://github.com/prettier/prettier) from 1.19.1 to 2.0.1.
- [Release notes](https://github.com/prettier/prettier/releases)
- [Changelog](https://github.com/prettier/prettier/blob/master/CHANGELOG.md)
- [Commits](prettier/prettier@1.19.1...2.0.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

package.json

@@ -39,7 +39,7 @@
     "eslint-plugin-standard": "^4.0.1",
     "gulp-data": "^1.3.1",
     "mocha": "^7.0.0",
-    "prettier": "^1.18.2",
+    "prettier": "^2.0.1",
     "vinyl": "^2.2.0"
   },
   "engines": {