FAST_REFRESH=true causes compilation error (Webpack 5 support)

Describe the bug FAST_REFRESH=true causes compilation error. Same as if I would configure .storybook/main.js or add plugin manually into config.plugins.

To Reproduce Steps to reproduce the behavior:

1. Default config
2. FAST_REFRESH=true start-storybook

The same project builds successfully with webpack & @pmmmwh/react-refresh-webpack-plugin. The same storybook compiles without FAST_REFRESH=true

yarn run v1.22.10
$ FAST_REFRESH=true start-storybook
info @storybook/react v6.1.15
info => Using prebuilt manager
info => Loading presets
info => Loading 1 config file in "./.storybook"
info => Loading 7 other files in "./.storybook"
info => Adding stories defined in ".storybook/main.js"
info => Using React fast refresh
info => Using default Webpack setup
0% compilingERR! TypeError: Cannot read property 'tap' of undefined
ERR!     at /Users/dan/github/project/node_modules/@pmmmwh/react-refresh-webpack-plugin/lib/index.js:236:65

Expected behavior Succesful compilation

System

Environment Info:

  System:
    OS: macOS 11.1
    CPU: (12) x64 Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz
  Binaries:
    Node: 13.8.0 - ~/.nvm/versions/node/v13.8.0/bin/node
    Yarn: 1.22.10 - ~/.nvm/versions/node/v13.8.0/bin/yarn
    npm: 6.13.6 - ~/.nvm/versions/node/v13.8.0/bin/npm
  Browsers:
    Chrome: 88.0.4324.96
    Firefox: 84.0.2
    Safari: 14.0.2
  npmPackages:
    @storybook/addon-actions: ^6.1.15 => 6.1.15 
    @storybook/addon-essentials: ^6.1.15 => 6.1.15 
    @storybook/addon-links: ^6.1.15 => 6.1.15 
    @storybook/react: ^6.1.15 => 6.1.15 

Packages:

    "react-refresh": "^0.9.0",
    "webpack": "^5.18.0",
    "@pmmmwh/react-refresh-webpack-plugin": "^0.4.3",

[shilman]

@timkindberg going to beta this week, final in about a month (knock wood)

[dcwarwick]

@shilman It works for us too with 6.4.0-alpha.25, many thanks!