update .gitignore

node_modules/fclone/bench/package.json

@@ -0,0 +1,20 @@
+{
+  "name": "bench",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "benchmark": "^2.1.0",
+    "clone": "^1.0.2",
+    "circular-json-es6": "^2.0.0",
+    "deepcopy": "^0.6.3",
+    "jsan": "^3.1.2",
+    "json-stringify-safe": "^5.0.1"
+  }
+}