fix: Fix failing empty-sourcemap test

Author: Mark1626

e2e/v8-coverage/empty-sourcemap/babel.config.js

@@ -6,5 +6,13 @@
  */
 
 module.exports = {
-  presets: ['@babel/preset-env', '@babel/preset-typescript'],
+  presets: [
+    ['@babel/preset-typescript'],
+    [
+      '@babel/preset-env',
+      {
+        targets: {node: 8},
+      },
+    ],
+  ],
 };