Webpack 5 Support / Refactoring

[web-mi]

I have refactored the code a little bit and added support for webpack 5 but webpack 4 is still be supported.
Maybe it should be released as major but it should not include any breaking changes.

• Webpack 5 support
• Refactored logic from prototype class to class
• Switched from done hook to afterEmit because webpack v5 shrinks assets to SizeOnlySource Changelog
• Added config validation
• Restructured options from single attributes to options attribute

Fixes #63

[statianzo]

This looks great! Webpack 5 and some much needed modernization. 🎉

Thank you @web-mi 🙏

It's worth cutting a new major because of the options validation and modern ES syntax.

[web-mi]

@statianzo could you tell me why you unset delay option for tiny-lr?
I could not find any usage of delay in tiny-lr but won't remove it because i don't know why you removed it.

[web-mi]

Changes are done.
I refactored the listen function a little bit.
The package.json now includes the peerDependency for webpack and engines for node version.
And i have added a changelog file.

I tried everything with node 10 too and it works so required node version is >= 10.

[statianzo]

@statianzo could you tell me why you unset delay option for tiny-lr?
I could not find any usage of delay in tiny-lr but won't remove it because i don't know why you removed it.

It came as part of #38. Likely being conservative about what gets passed through to tiny-lr, to prevent issues if it were to add delay.

[statianzo]

Released v3.0.0. Switched to github actions for CI because travis seems to no longer run.

Thanks again @web-mi