Bump postcss-cli from 6.1.2 to 6.1.3

Bumps [postcss-cli](https://github.com/postcss/postcss-cli) from 6.1.2 to 6.1.3.
- [Release notes](https://github.com/postcss/postcss-cli/releases)
- [Changelog](https://github.com/postcss/postcss-cli/blob/master/CHANGELOG.md)
- [Commits](postcss/postcss-cli@6.1.2...6.1.3)

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

package.json

@@ -51,7 +51,7 @@
     "moment": "^2.24.0",
     "node-sass": "^4.12.0",
     "postcss": "^7.0.17",
-    "postcss-cli": "^6.1.2",
+    "postcss-cli": "^6.1.3",
     "prop-types": "^15.7.2",
     "react": "^16.8.6",
     "react-dom": "^16.8.6",