common/config/beachball/ts-node-register.js

const tsNode = require('ts-node');

tsNode.register({
  transpileOnly: true,
  compilerOptions: {
    declaration: true,
    esModuleInterop: true,
    experimentalDecorators: true,
    module: 'commonJS',
    moduleResolution: 'node',
    target: 'ES6'
  },
  skipProject: true
});