chore(package.json): upgrade postcss-safe-parser version

Author: jlengrand

package.json

@@ -50,7 +50,7 @@
     "optimize-css-assets-webpack-plugin": "5.0.3",
     "postcss-flexbugs-fixes": "4.2.1",
     "postcss-loader": "4.0.3",
-    "postcss-safe-parser": "4.0.2",
+    "postcss-safe-parser": "5.0.2",
     "promise": "8.1.0",
     "prompt": "1.0.0",
     "react-dev-utils": "6.1.1",