fix(UnitTests): Fixing "Cannot find module @cornerstonejs/core" error while running unit tests (#5148)

babel.config.js

@@ -18,6 +18,8 @@ module.exports = {
           {
             modules: 'commonjs',
             debug: false,
+            targets: { node: 'current' },
+            bugfixes: true,
           },
         ],
         '@babel/preset-react',
@@ -32,6 +34,7 @@ module.exports = {
         '@babel/plugin-transform-runtime',
         '@babel/plugin-transform-typescript',
         '@babel/plugin-transform-class-static-block',
+        '@babel/plugin-transform-for-of',
       ],
     },
     production: {