lower html-webpack-plugin 4 peer dependency version 4.5.1 -> 4.5.0

[lkarmelo]

Npm 7+ doesn't allow installing preload-webpack-plugin alongside html-webpack-plugin 4.5.0 without runnig --legacy-peer-deps, although it works fine with 4.5.0 version. I use Create React App v.4.0.3 and have no control over html-webpack-plugin version, but i wanted to customize CRA config without ejecting and i believe many people would potentially want to do the same.

[lkarmelo]

Also I am not sure if I should lower dependency version for webpack4 e2e tests as well. Changing it from ^4.5.1 to ^4.5.0 wouldn't really affect anything, because version 4.5.2 is installed regardless, but it would be consistent with peer dependency version.