Webpack dev server not beeing killed by CTRL+C in Windows

[McSneaky]

Proposed changes

Killing server with CTRL-C in dev mode in Windows leaves webpack-dev-server running on port 8080 and
never releases it, making it impossible to start up again with node ace serve -w because port 8080 is already in use.

Have to use Get-Process -Id (Get-NetTCPConnection -LocalPort 8080).OwningProcess to find the proccess ID and then kill it with Stop-Process -ID ID_HERE -Force

Fixes adonisjs/core#2562

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist

• I have read the CONTRIBUTING doc
• Lint and unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works.
• I have added necessary documentation (if appropriate)

[thetutlage]

🙂