fix(deps): update dependency pkg-dir to v9

Author: renovate[bot]

plugin-externals/package.json

@@ -46,7 +46,7 @@
   "dependencies": {
     "@niceties/logger": "^1.1.4",
     "is-builtin-module": "^3.2.0",
-    "pkg-dir": "5.0.0",
+    "pkg-dir": "9.0.0",
     "@rollup-extras/utils": "workspace:^"
   },
   "peerDependencies": {