fix: Run Process.runSync in another shell to get Dart version

[lulupointu]

Description

When trying to get the dart version, dart --version should be run inside a separate shell to avoid failing when running in a sub process.

The failing of this command is actually used here:

melos/packages/melos/lib/src/common/utils.dart

Lines 404 to 411 in 431ecb2

	bool isPubSubcommand({required MelosWorkspace workspace}) {
	try {
	return Process.runSync(workspace.sdkTool('pub'), ['--version']).exitCode !=
	0;
	} on ProcessException {
	return true;
	}
	}

This bug was introduced in 740050c since it changed how to dart version is retrieved.

Type of Change

• ✨ feat -- New feature (non-breaking change which adds functionality)
• 🛠️ fix -- Bug fix (non-breaking change which fixes an issue)
• ❌ ! -- Breaking change (fix or feature that would cause existing functionality to change)
• 🧹 refactor -- Code refactor
• ✅ ci -- Build configuration change
• 📝 docs -- Documentation
• 🗑️ chore -- Chore

[CLAassistant]

All committers have signed the CLA.

[blaugold]

Thanks for the PR! I don't quite understand yet what the behavior is that this fixes. Do you get an error and if so, what is it?

Edit: #301 has more details on the root cause.