Upgrade dotenv-expand to fix issues (#7531)

Author: dominictobias

packages/react-scripts/package.json

@@ -41,7 +41,7 @@
     "case-sensitive-paths-webpack-plugin": "2.2.0",
     "css-loader": "2.1.1",
     "dotenv": "6.2.0",
-    "dotenv-expand": "4.2.0",
+    "dotenv-expand": "5.1.0",
     "eslint": "^6.1.0",
     "eslint-config-react-app": "^5.0.1",
     "eslint-loader": "2.2.1",