Simplifies the comma-separated parsing logic to:
- If value contains '[', parse as JSON array
- Otherwise, parse as comma-separated values
This prevents incorrect splitting of arguments containing internal commas
when there's only one argument. For arguments with commas, users should
use JSON format: CHROME_ARGS='["--arg1,val", "--arg2"]'
Also exports getEnvArray in module.exports for consistency.
Co-authored-by: Nick Sweeting <pirate@users.noreply.github.com>
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