Environment

• CLI: 6.0.3
• Cross-platform modules:
• Android Runtime: 28
• iOS Runtime:
• Plugin(s): @babel/cli, @babel/core, @babel/preset-env, @babel/preset-react, @babel/register, babel-loader, nativescript-dev-babel, copy-webpack-plugin, webpack-cli
• Node.js: 12.10.0

Describe the bug
The Babel integration is not complete, it's not possible to use ES6 for webpack.config.js file. In case, if I do webpack.config.babel.js with ES6, the tns build android command returns error, however webpack --dev.android runs successfully.

To Reproduce
create sample Nativescript 6.x application. Execute$ tns install babel, rename webpack.config.js to webpack.config.babel.js use ES6 javascript for the configuration file. Try to execute$ tns build android.

Expected behavior
the project builds successfully, webpack.config.babel.js is automatically engaged.