upgrade eslint-plugin-html

[mysticatea]

This plugin depends on eslint-plugin-html@2. However, it does not support ESLint 4. I want to upgrade it to latest. But it's a breaking change because the latest eslint-plugin-html supports only eslint@>=4.7.0.

Can we upgrade eslint-plugin-html to the latest?

[yyx990803]

Yeah, we can release a new major for this package.