chore: enable using the plugin without .default

[dqn]

Enable using this plugin without property access like .default.

// const HTMLInlineCSSWebpackPlugin = require("html-inline-css-webpack-plugin").default;
const HTMLInlineCSSWebpackPlugin = require("html-inline-css-webpack-plugin");

[runjuu]

Hi @dqn , It looks like a breaking change. Can it compatible with the old way ?

[dqn]

Hi @runjuu. You're right, it's a breaking change.
If you can merge it, maybe this change should be merged into another branch, such as a develop branch, so that people who see the README of this repository are not confused.

[github-actions]

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