Added fast-safe-stringify dep

Author: delvedor

package.json

@@ -29,5 +29,8 @@
     "pre-commit": "^1.1.3",
     "standard": "^8.2.0",
     "tap": "^7.1.2"
+  },
+  "dependencies": {
+    "fast-safe-stringify": "^1.1.0"
   }
 }