Update dependency declaration

Use link for defining core SDK dependency.

package.json

@@ -93,6 +93,6 @@
     "fetch-ponyfill": "^7.1.0",
     "wrap-ansi": "^8.0.1",
     "yargs": "^17.4.1",
-    "@modal-sh/oblique-strategies-core": "file:../core"
+    "@modal-sh/oblique-strategies-core": "link:../core"
   }
 }