build(deps-dev): bump standard from 14.3.4 to 15.0.0 in /frontend (#642)

Bumps [standard](https://github.com/standard/standard) from 14.3.4 to 15.0.0.
- [Release notes](https://github.com/standard/standard/releases)
- [Changelog](https://github.com/standard/standard/blob/master/CHANGELOG.md)
- [Commits](standard/standard@v14.3.4...v15.0.0)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

frontend/package.json

@@ -43,7 +43,7 @@
     "optimize-css-assets-webpack-plugin": "^5.0.3",
     "prettier": "1.19.1",
     "sass-loader": "^10.0.1",
-    "standard": "^14.1.0",
+    "standard": "^15.0.0",
     "terser-webpack-plugin": "^4.1.0",
     "webpack": "^4.40.2",
     "webpack-cli": "^4.0.0",