Upgrade babel, css-loader, webpack
Upgrade babel, css-loader, webpack

 - @babel/core@7.8.3
 - @babel/preset-env@7.8.3
 - css-loader@3.4.2
 - webpack@4.41.5

opmuse/opmuse,opmuse/opmuse,opmuse/opmuse,opmuse/opmuse