Cannot install version 0.6+ with npm

[nielsvandermolen]

Describe the bug
After installing with npm the following bug is triggered.

npm ERR! command sh -c npx -y only-allow pnpm                                                    
npm ERR! ║   Use "pnpm install" for installation in this project.                                              
npm ERR! ║   If you don't have pnpm, install it via "npm i -g pnpm".  
npm ERR! ║   For more details, go to https://pnpm.js.org/

To Reproduce
npm install --save-dev svelte-adapter-firebase@0.6.1

Expected behavior
The adapter should be able to be installed with npm

Additional context
It seems pnpm can not do anything npm can not do besides being a bit more efficient in caching. Therefore pnpm should not be a requirement to install the adapter?

This line in package.json is causing the issue:

  "scripts": {
    "preinstall": "npx -y only-allow pnpm",

[nielsvandermolen]

I should read better duplicate of #44

[jthegedus]

Please try 0.6.3 as I believe this has been fixed.