Incorrect typesVersions in @storybook/* packages cause build errors with older TS versions

[EliHowey]

Describe the bug
I have an Angular 9 Storybook running on TypeScript v3.6.5. I recently tried to upgrade Storybook from v6.1.3 to v6.3.0-rc.0, but ran into a TS compilation error in every file that imported a @storybook package: Cannot find module '@storybook/*'

I was able to trace the issue to the typesVersions listed in each package's package.json. Currently, each package lists something like the following:

"types": "dist/ts3.9/index.d.ts",
"typesVersions": {
  "<3.8": {
    "*": [
      "dist/ts3.4/*"
    ]
  }
}

When TypeScript resolves file paths using typesVersions, it substitutes the entire matching glob in the replacement glob. In this case, dist/ts3.9/index.d.ts matches the search glob *, so it maps that to dist/ts3.4/dist/ts3.9/index.d.ts, rather than dist/ts3.4/index.d.ts.

Changing the typesVersions to the following fixes the errors:

"typesVersions": {
  "<3.8": {
    "dist/ts3.9/*": [
      "dist/ts3.4/*"
    ]
  }
}

To Reproduce
I haven't created a minimal reproduction, but I'd expect this to affect any Storybook project using a TypeScript version earlier than v3.8.

System

Environment Info:

  System:
    OS: macOS 11.4
    CPU: (12) x64 Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz
  Binaries:
    Node: 12.22.0 - ~/.nvm/versions/node/v12.22.0/bin/node
    npm: 6.14.11 - ~/.nvm/versions/node/v12.22.0/bin/npm
  Browsers:
    Chrome: 91.0.4472.77
    Edge: 91.0.864.41
    Firefox: 89.0
    Safari: 14.1.1
  npmPackages:
    @storybook/addon-a11y: 6.3.0-rc.0 => 6.3.0-rc.0 
    @storybook/addon-docs: 6.3.0-rc.0 => 6.3.0-rc.0 
    @storybook/addon-essentials: 6.3.0-rc.0 => 6.3.0-rc.0 
    @storybook/addon-knobs: 6.2.9 => 6.2.9 
    @storybook/addons: 6.3.0-rc.0 => 6.3.0-rc.0 
    @storybook/angular: 6.3.0-rc.0 => 6.3.0-rc.0 
    @storybook/builder-webpack5: 6.3.0-rc.0 => 6.3.0-rc.0 
    @storybook/manager-webpack5: 6.3.0-rc.0 => 6.3.0-rc.0 

Additional context

[shilman]

Huzzah!! I just released https://github.com/storybookjs/storybook/releases/tag/v6.4.0-alpha.33 containing PR #15918 that references this issue. Upgrade today to the @next NPM tag to try it out!

npx sb upgrade --prerelease

Closing this issue. Please re-open if you think there's still more to do.