Removing not necessary babel and other webpack improves

[kalwalt]

Babel is not necessary for the compilation so i'm removing it.

List of other changes/improvements:

• added TerserPlugin in the webpack.config.js, the package was altready loaded with npm but never setup (?)
• @types/node is upgraded to the 14 LTS and typescript to 3.4 because that should be the compatible version
• redefined globalObject according to https://github.com/webpack/webpack/issues/6522 aadn publicPath set to auto
• three is not needed anymore in the externals because we don't import into ARnft. ARnft-threejs exist for this

[kalwalt]

because we don't import THREE as a npm packge i think this https://github.com/webarkit/ARnft/blob/4a6a1a5c0600427393336a1efee8c4b6fe77f2f5/webpack.config.js#L19-L24 can be removed.