chore: add console output when minifying fails (#648)

* chore: add console output when minifying fails

* chore(style): tabs to spaces

* Update error message

Co-authored-by: Steven <steven@ceriously.com>
Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>

src/index.js

@@ -410,11 +410,14 @@ function ncc (
       });
       // For some reason, auth0 returns "undefined"!
       // custom terser phase used over Webpack integration for this reason
-      if (result.code !== undefined)
+      if (result.code !== undefined) {
         ({ code, map } = {
           code: result.code,
           map: sourceMap ? JSON.parse(result.map) : undefined
         });
+      } else {
+        console.log('An error occurred while minifying. The result will not be minified.')
+      }
     }
 
     if (v8cache) {