heroku error: @material-ui/icons

client/package-lock.json

@@ -2249,7 +2249,6 @@
       "version": "4.5.1",
       "resolved": "https://registry.npmjs.org/@material-ui/icons/-/icons-4.5.1.tgz",
       "integrity": "sha512-YZ/BgJbXX4a0gOuKWb30mBaHaoXRqPanlePam83JQPZ/y4kl+3aW0Wv9tlR70hB5EGAkEJGW5m4ktJwMgxQAeA==",
-      "dev": true,
       "requires": {
         "@babel/runtime": "^7.4.4"
       }

client/package.json

@@ -5,6 +5,7 @@
   "homepage": "https://mohiit1502.github.io/PictureStory-v2",
   "dependencies": {
     "@material-ui/core": "^4.8.2",
+    "@material-ui/icons": "^4.5.1",
     "@svgr/webpack": "4.3.2",
     "@typescript-eslint/eslint-plugin": "^2.14.0",
     "@typescript-eslint/parser": "^2.14.0",
@@ -161,7 +162,6 @@
     "@babel/plugin-transform-react-jsx": "^7.7.7",
     "@babel/preset-env": "^7.7.7",
     "@babel/preset-react": "^7.7.4",
-    "@material-ui/icons": "^4.5.1",
     "body-parser": "^1.19.0",
     "plop": "^2.5.3"
   },