fix: plugins parser not inferred

[u3u]

Fixed #3026

• Add test
• Upgrade PNPM version to v8

After running yarn test without changing anything locally, I had 2 test failures. But I don't know why. Is it a problem with my local environment?

• Run tests
• Update the CHANGELOG.md with a summary of your changes

[u3u]

After confirmation, it was found that the reason for the failure of the following two tests was due to the existence of ~/.prettierrc.cjs file in my local environment. After temporarily renaming it, all tests have passed.

• it uses config from .editorconfig file
• it uses config from vscode settings

In addition, because I use 8.6.2 for my local PNPM version, the version of lock file test-fixtures/plugins-pnpm/pnpm-lock.yaml will be updated. However, PNPM 8 requires Node.js 16 or above, while GitHub Actions currently uses Node.js 14, which will cause the operation to fail.

https://github.com/u3u/prettier-vscode/actions/runs/5269104746/jobs/9526747643

prettier-vscode/.github/workflows/main.yml

Lines 13 to 20 in 03bbcc6

	- uses: pnpm/action-setup@v2.2.4
	with:
	version: 7
	run_install: false
	- uses: actions/checkout@v3
	- uses: actions/setup-node@v3
	with:
	node-version: "14"

[ntotten]

Looks pretty good, there is one test failing though. Can you take a look?

[u3u]

@ntotten Hi, this is a bit strange. All tests passed before you merged the main branch, and after I updated it, I ran the tests locally again and they also passed.

All passed: https://github.com/prettier/prettier-vscode/actions/runs/5302709062/jobs/9600483439
Partial passed: https://github.com/prettier/prettier-vscode/actions/runs/5304290262/jobs/9601182513

The failed test is "it formats by Prettier v3", which should not be related to my changes.

And now there are strange errors in the main branch testing, which makes me have to suspect whether it is caused by this commit 🤔 (822ad24)
https://github.com/prettier/prettier-vscode/actions/runs/5304286381/jobs/9600500159

[u3u]

I don't understand why using pnpm 7 would affect this test.
There is no problem testing pnpm 8 on non-Windows systems now.

[u3u]

https://github.com/u3u/prettier-vscode/actions/runs/5330997873
All tests have passed now. Since Windows cannot use Node.js 18 for testing in CI, only pnpm 7 can be used.

To pass the "it formats by Prettier v3" test when using pnpm 7, lockfileVersion of pnpm-lock.yaml needs to be restored to 5.4. I don't know why it is necessary. For future compatibility, I kept the file .npmrc under test-fixtures/plugins-pnpm/.