box.json - Include gratuitous nikic autoloader

We don't really want this package, but we pull in `cv` (which pulls in
`psysh` which pulls in `nikic/php-parser`), and it crashes if these files
aren't available.

box.json

@@ -13,6 +13,14 @@
             ],
             "in": "vendor"
         },
+        {
+            "name": "bootstrap.php",
+            "in": "vendor/nikic/php-parser/lib"
+        },
+        {
+            "name": "Autoloader.php",
+            "in": "vendor/nikic/php-parser/lib/PhpParser"
+        },
         {
             "name": "*.csv",
             "in": "vendor/totten/license-data"