fix: add which to dependencies (#88)

Author: jackw

package.json

@@ -28,7 +28,8 @@
     "@npmcli/node-gyp": "^2.0.0",
     "@npmcli/promise-spawn": "^3.0.0",
     "node-gyp": "^9.0.0",
-    "read-package-json-fast": "^2.0.3"
+    "read-package-json-fast": "^2.0.3",
+    "which": "^2.0.2"
   },
   "files": [
     "bin/",