Migrate to Webpack 5

[abhishek-kaushik]

Major Changes

1. Webpack 5 Migration

• Updated webpack from v4 to v5.101.3
• Updated webpack-cli to v6.0.1
• Updated webpack-dev-server to v5.2.2
• Modified webpack configuration to be compatible with Webpack 5

2. ESLint Migration to v9 with Flat Config

• Replaced deprecated @humanmade/eslint-config
• Created modern eslint.config.mjs using ESLint 9's flat config format
• Removed .eslintignore and .eslintrc.js (replaced by flat config)
• Updated to ESLint 9.34.0

3. Dependencies Overhaul

• Updated numerous webpack-related packages for v5 compatibility
• Updated build tooling and loaders
• Cleaned up peer dependencies

4. Configuration Updates

• Updated loader configurations for Webpack 5 compatibility
• Modified plugin configurations
• Updated test configurations

Breaking Changes

• Webpack 5: This is a major version upgrade with breaking changes
• ESLint 9: Requires flat config format, older ESLint configs won't work
• Node.js: Likely requires newer Node.js versions for Webpack 5 support

[mattheu]

I know there was a branch with some effort done towards this but it's been a while now and I forget what ultimately blocked this. Either way awesome to pick this up and try get it done!

[mattheu]

https://github.com/humanmade/webpack-helpers/tree/v1

[mattheu]

FWIW I don't care so much about breaking changes. It's a new major version and we have to move forwards. As long as we have them documented

[abhishek-kaushik]

I know there was a branch with some effort done towards this but it's been a while now and I forget what ultimately blocked this. Either way awesome to pick this up and try get it done!

Yeah, there was a PR from Ignacio as well, I thought I am gonna start freash

[abhishek-kaushik]

FWIW I don't care so much about breaking changes. It's a new major version and we have to move forwards. As long as we have them documented

Yeah, that's why I did not think much for backward compatibility

[kadamwhite]

I don't think anything particularly blocked #205 beyond nobody taking the time to follow through on it. Thanks for this, I'm fine starting fresh!

[joehoyle]

@abhishek-kaushik could we document or add a constraint for the nodejs supported version? Not sure if that can be in package.json or the readme

[abhishek-kaushik]

@joehoyle , Added nvmrc file and updated Read me as well