Bump prettier from 1.18.2 to 1.19.1

Bumps [prettier](https://github.com/prettier/prettier) from 1.18.2 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@1.18.2...1.19.1)

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

Author: dependabot-preview[bot]

package-lock.json

@@ -18,7 +18,7 @@
     "cross-env": "^6.0.3",
     "css-loader": "^3.0.0",
     "node-sass": "^4.13.0",
-    "prettier": "^1.18.2",
+    "prettier": "^1.19.1",
     "sass-loader": "^7.3.1",
     "source-map-loader": "^0.2.4",
     "ts-loader": "^6.2.1",