Bump node-sass from 4.14.1 to 5.0.0

Bumps [node-sass](https://github.com/sass/node-sass) from 4.14.1 to 5.0.0.
- [Release notes](https://github.com/sass/node-sass/releases)
- [Changelog](https://github.com/sass/node-sass/blob/master/CHANGELOG.md)
- [Commits](sass/node-sass@v4.14.1...v5.0.0)

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

package.json

@@ -18,7 +18,7 @@
     "lint-staged": "^10.5.1",
     "lodash": "^4.17.20",
     "node-opencc": "^2.0.1",
-    "node-sass": "^4.14.1",
+    "node-sass": "^5.0.0",
     "prettier": "^2.1.2",
     "prop-types": "^15.7.2",
     "react": "^16.14.0",