better git push script, before publish instead of after

Author: isaacs

package.json

@@ -13,7 +13,7 @@
     "test": "tap test/*.js --100 -J",
     "preversion": "npm test",
     "postversion": "npm publish",
-    "postpublish": "git push origin --all; git push origin --tags"
+    "prepublishOnly": "git push origin --follow-tags"
   },
   "engines": {
     "node": "*"