Bump prettier from 1.16.3 to 1.16.4 (#2916)

Bumps [prettier](https://github.com/prettier/prettier) from 1.16.3 to 1.16.4.
- [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/1.16.3...1.16.4)

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

package.json

@@ -180,7 +180,7 @@
     "nyc": "^13.0.1",
     "opn-cli": "^4.0.0",
     "portfinder": "^1.0.20",
-    "prettier": "1.16.3",
+    "prettier": "1.16.4",
     "prettier-check": "^2.0.0",
     "pretty": "^2.0.0",
     "prop-types": "^15.6.0",