Update prettier to version 2.0.4

Author: depfu[bot]

package-lock.json

@@ -83,7 +83,7 @@
     "npm-run-all": "^4.1.5",
     "postcss-loader": "^3.0.0",
     "postcss-preset-env": "^6.7.0",
-    "prettier": "^2.0.3",
+    "prettier": "^2.0.4",
     "sass": "^1.26.3",
     "sass-loader": "^8.0.2",
     "standard-version": "^7.1.0",