feat: Update/switch friendly-errors-webpack-plugin

[mihkeleidast]

This fixes a peerDependency mismatch warning when installing playroom:

npm WARN friendly-errors-webpack-plugin@1.7.0 requires a peer of webpack@^2.0.0 || ^3.0.0 || ^4.0.0 but none is installed. You must install peer dependencies yourself.

Since the original plugin is unmaintained (repo is even archived), I switched the used package to the most popular fork. Having no peerDependency warnings is quite important to me, as we're planning to move to npm@7, where these kinds of mismatches throw errors.

[michaeltaranto]

Looks good. Thanks 👏