Support webpack 5

[ylavoie]

Environment

• Plugin Version: 0.5.6
• Webpack Version: 5.38.1
• OS Version: Linux
• Node Version: 16.2.0
• NPM Version: 7.13.0
• Browser Version: n/a

Current Behavior

Building with webpack 5 gives:

(node:1600) [DEP_WEBPACK_DEPRECATION_ARRAY_TO_SET_PUSH] DeprecationWarning: chunk.files was changed from Array to Set (using Array method 'push' is deprecated)ush (/srv/ledgersmb/node_modules/webpack/lib/util/deprecation.js:108:3)
    at ObsoleteWebpackPlugin.additionalAssets (/srv/ledgersmb/node_modules/obsolete-webpack-plugin/src/index.js:74:25)

Expected Behavior

No errors

[Yegorich555]

Looks like the package hasn't been supported anymore. We have an improved/refactored version for webpack 5: https://github.com/AndrushkevichMikita/webpack-obsolete-plugin