Bump prettier from 1.19.1 to 2.0.5

Bumps [prettier](https://github.com/prettier/prettier) from 1.19.1 to 2.0.5.
- [Release notes](https://github.com/prettier/prettier/releases)
- [Changelog](https://github.com/prettier/prettier/blob/master/CHANGELOG.md)
- [Commits](https://github.com/prettier/prettier/compare/1.19.1...2.0.5)

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

package.json

@@ -37,7 +37,7 @@
         "gulp-rev": "^9.0.0",
         "gulp-rev-replace": "^0.4.4",
         "gulp-sass": "^4.0.2",
-        "prettier": "^1.18.2"
+        "prettier": "^2.0.5"
     },
     "browserslist": [
         ">0.2%",