Deprecate eslint-loader

[ricardogobbosouza]

Use eslint-webpack-plugin instead of eslint-loader

See https://github.com/webpack-contrib/eslint-webpack-plugin#about-plugin

[millerrafi]

Should this be noted in the README?

[alexander-akait]

@ricardogobbosouza I think it is time to deprecated, webpack@5 eta is 2020-10-10, so I think we can do it

[ricardogobbosouza]

@evilebottnawi
I'll do it tomorrow =)

[ricardogobbosouza]

@evilebottnawi deprecated
https://www.npmjs.com/package/eslint-loader