Copy-webpack-plugin: Webpack 4 support

[jbruni]

This is the error I get trying to use this plugin with Webpack 4 beta:

/home/jbruni/project/node_modules/copy-webpack-plugin/dist/index.js:151
                    compilation.contextDependencies.push(context);
                                                    ^

TypeError: compilation.contextDependencies.push is not a function

[alexander-akait]

@jbruni thanks for issue, fix it in near future

[riccardolardi]

Any news on webpack 4 support?

[alexander-akait]

@alberto2000 we already support webpack@4 just update you deps