我无法将React应用部署到Heroku。错误（在运行heroku-postbuild脚本时）。
有错误：
There might be a problem with the project dependency tree.
remote: It is likely not a bug in Create React App, but something you need to fix locally.
remote: The react-scripts package provided by Create React App requires a dependency:
remote: "webpack": "4.39.1"
remote: Don't try to install it manually: your package manager does it automatically.
我以前在本地计算机上遇到此错误，但已修复。现在，一切都可以在本地计算机上运行。没有问题。但是，当我尝试将应用程序部署到Heroku时，由于该错误而失败。
我现在该怎么做才能在Heroku上进行部署？
这是我的package.json：
{
"name": "client",
"version": "0.1.0",
"private": true,
"dependencies": {
"@babel/core": "^7.5.5",
"@babel/preset-env": "^7.5.5",
"@babel/preset-react": "^7.0.0",
"@khanacademy/react-multi-select": "^0.3.3",
"axios": "^0.19.0",
"babel-eslint": "^10.0.2",
"babel-loader": "^8.0.6",
"babel-plugin-add-module-exports": "^1.0.2",
"babel-preset-es2015": "^6.24.1",
"classnames": "^2.2.6",
"copy-webpack-plugin": "^5.0.4",
"eslint": "^6.1.0",
"moment": "^2.24.0",
"moment-timezone": "^0.5.26",
"multiselect-dropdown-react": "^1.0.5",
"query-string": "^6.8.1",
"react": "^16.8.6",
"react-dom": "^16.8.6",
"react-dropdown-select": "^3.3.2",
"react-intl": "^3.1.7",
"react-moment": "^0.9.2",
"react-redux": "^7.1.0",
"react-router-dom": "^5.0.1",
"react-scripts": "3.1.0",
"react-select": "^3.0.4",
"react-timezone": "^2.4.0",
"redux": "^4.0.1",
"redux-devtools-extension": "^2.13.8",
"redux-thunk": "^2.3.0",
"uglifyjs-webpack-plugin": "^2.2.0",
"uuid": "^3.3.2",
"webpack": "^4.39.1",
"webpack-dev-server": "^3.2.1",
"yargs": "^13.3.0"
},
"scripts": {
"start": "react-scripts start",
"build": "react-scripts build",
"test": "react-scripts test",
"eject": "react-scripts eject",
"webpack_build": "WEBPACK_ENV=build webpack",
"webpack_dev": "WEBPACK_ENV=dev webpack --progress --colors --watch"
},
"eslintConfig": {
"extends": "react-app"
},
"browserslist": {
"production": [
">0.2%",
"not dead",
"not op_mini all"
],
"development": [
"last 1 chrome version",
"last 1 firefox version",
"last 1 safari version"
]
},
"proxy": "http://localhost:5000",
"devDependencies": {
"css-loader": "^3.2.0",
"eslint-plugin-react": "^7.14.3",
"file-loader": "^4.2.0",
"html-loader": "^0.5.5",
"image-webpack-loader": "^5.0.0",
"json-loader": "^0.5.7",
"style-loader": "^1.0.0",
"webpack-cli": "^3.3.6"
}
}