docs: update package.json

Author: gunjjoshi

lib/node_modules/@stdlib/math/base/special/dirichlet-eta/package.json

@@ -14,11 +14,15 @@
     }
   ],
   "main": "./lib",
+  "gypfile": true,
   "directories": {
     "benchmark": "./benchmark",
     "doc": "./docs",
     "example": "./examples",
+    "include": "./include",
     "lib": "./lib",
+    "scripts": "./scripts",
+    "src": "./src",
     "test": "./test"
   },
   "types": "./docs/types",