🤖 config(babel): Enable inline sourceMaps during tests.

These changes were automatically generated by a transform whose code can be found at:
  - https://github.com/make-github-pseudonymous-again/rejuvenate/blob/7a92df9c28303ed9cd6ee1a5e4999acfc8c52497/src/transforms/babel:setup-debug-and-test-sourcemaps.js
Please contact the author of the transform if you believe there was an error.

package.json

@@ -110,6 +110,7 @@
     ],
     "env": {
       "debug": {
+        "sourceMaps": "both",
         "presets": [
           [
             "@babel/preset-env",
@@ -121,6 +122,7 @@
         ]
       },
       "test": {
+        "sourceMaps": "both",
         "presets": [
           [
             "@babel/preset-env",