test(exports): update the test (#366)

This happened because the deep object assign was created before the
package exports test was merged and therefore didn't come with an update
to the snapshot and CI didn't catch it (I have no idea why because
require up to date is enabled in the settings of the repo).

Author: Thomaash

__snapshots__/test/package.test.ts.js

@@ -4,6 +4,8 @@ exports['Package Exported files 1'] = {
     "        LICENSE-APACHE-2.0",
     "        LICENSE-MIT",
     "        README.md",
+    "        declarations/deep-object-assign.d.ts",
+    "        declarations/deep-object-assign.d.ts.map",
     "        declarations/entry-esnext.d.ts",
     "        declarations/entry-esnext.d.ts.map",
     "        declarations/entry-peer.d.ts",