(node:16112) UnhandledPromiseRejectionWarning: TypeError: merge is not a function
    at module.exports (H:\ld\task\code\Webpack\02\build\webpack.config.js:8:12)
    at H:\ld\task\code\Webpack\02\node_modules\webpack-cli\lib\groups\resolveConfig.js:176:35
    at Array.map (<anonymous>)
    at finalize (H:\ld\task\code\Webpack\02\node_modules\webpack-cli\lib\groups\resolveConfig.js:166:20)
    at H:\ld\task\code\Webpack\02\node_modules\webpack-cli\lib\groups\resolveConfig.js:101:20
    at Array.map (<anonymous>)
    at resolveConfigFiles (H:\ld\task\code\Webpack\02\node_modules\webpack-cli\lib\groups\resolveConfig.js:89:41)
    at module.exports (H:\ld\task\code\Webpack\02\node_modules\webpack-cli\lib\groups\resolveConfig.js:247:11)
    at WebpackCLI._baseResolver (H:\ld\task\code\Webpack\02\node_modules\webpack-cli\lib\webpack-cli.js:53:38)
    at H:\ld\task\code\Webpack\02\node_modules\webpack-cli\lib\webpack-cli.js:149:30
(Use `node --trace-warnings ...` to show where the warning was created)
(node:16112) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 2)
(node:16112) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

webpack-merge最新版本导致的问题
我的版本是

    "webpack-merge": "^5.4.0"

问题参考
https://www.npmjs.com/package/webpack-merge
解决=>

const { merge } = require('webpack-merge')