deps: move rimraf to prod deps

Author: zkat

node_modules/rimraf/package.json

@@ -117,7 +117,7 @@
     "readable-stream": "^2.3.6",
     "request": "^2.88.0",
     "retry": "^0.12.0",
-    "rimraf": "~2.6.2",
+    "rimraf": "^2.6.2",
     "safe-buffer": "^5.1.2",
     "semver": "^5.5.1",
     "sha": "~2.0.1",