Install webpack-encore

[McSneaky]

Proposed changes

Webpack encore is missing when creating new web project and you select Encore

@symfony/webpack-encore is missing from package.json

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)

Further comments

I'm unsure if that's correct way to do it 😅

[McSneaky]

Used Github GUI to update files. Please be super-hyper critical when reviewing it :)

[thetutlage]

WebPack is configured using AdonisJS assembler package. https://github.com/adonisjs/assembler/blob/develop/commands/Invoke.ts#L47

However, there was a error happening during install because of peer dependencies mis-match, which was swallowed by the command.

I have added fix for both the issues.

• Fix peer dependencies issue - adonisjs/assembler@c13473b
• Show installation errors - adonisjs/assembler@5e0a927