Gatsby 5 Peer Dependency Support?

[broksonic21]

Verify if it is a postcss bug
First verify that gatsby-plugin-purgecss is working by setting the option printRejected: true which will print out the list of removed selectors.
If the plugin is working, but the css is not getting purged as you would have hoped then it's very likely a purgecss issue. File for purgecss related bugs here https://github.com/FullHuman/purgecss/issues.

• I have verified that this is not a purgecss issue.

Describe the bug
Gatsby 5 is out, but gatsby-plugin-purgecss only supports gatsby@"^2.0.0 || ^3.0.0 || ^4.0.0"

To Reproduce
Sample package.json to repro:

  "name": "test",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "gatsby-plugin-purgecss": "^6.1.2",
    "gatsby": "^5.1.0"
  }
}

Error with npm:

npm ERR! code ERESOLVE
npm ERR! ERESOLVE unable to resolve dependency tree
npm ERR!
npm ERR! While resolving: test@1.0.0
npm ERR! Found: gatsby@5.1.0
npm ERR! node_modules/gatsby
npm ERR!   gatsby@"^5.1.0" from the root project
npm ERR!
npm ERR! Could not resolve dependency:
npm ERR! peer gatsby@"^2.0.0 || ^3.0.0 || ^4.0.0" from gatsby-plugin-purgecss@6.1.2
npm ERR! node_modules/gatsby-plugin-purgecss
npm ERR!   gatsby-plugin-purgecss@"^6.1.2" from the root project
npm ERR!
npm ERR! Fix the upstream dependency conflict, or retry
npm ERR! this command with --force, or --legacy-peer-deps
npm ERR! to accept an incorrect (and potentially broken) dependency resolution.

Configs

• I have removed all personal information.

Expected behavior
Support latest gatsby version as a peer dependency

Additional information
n/a

[anantoghosh]

I'll update it soon.

[HKdAlex]

What be really great, thank you!

[anantoghosh]

Released in v6.2.0.