Bump prettier from 1.13.4 to 1.19.1

Bumps [prettier](https://github.com/prettier/prettier) from 1.13.4 to 1.19.1.
- [Release notes](https://github.com/prettier/prettier/releases)
- [Changelog](https://github.com/prettier/prettier/blob/master/CHANGELOG.md)
- [Commits](prettier/prettier@1.13.4...1.19.1)

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

Author: dependabot-preview[bot]

package-lock.json

@@ -82,7 +82,7 @@
     "loader.js": "^4.7.0",
     "normalize.css": "^7.0.0",
     "nyc": "^14.1.1",
-    "prettier": "^1.13.4",
+    "prettier": "^1.19.1",
     "qunit-dom": "^0.9.2",
     "sass": "^1.23.0-module.beta.1",
     "semver": "^6.3.0",