prepublish -> prepublishOnly

package.json

@@ -5,7 +5,7 @@
   "main": "index.js",
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1",
-    "prepublish": "mv README.md githubREADME.md && mv npmREADME.md README.md",
+    "prepublishOnly": "mv README.md githubREADME.md && mv npmREADME.md README.md",
     "postpublish": "mv README.md npmREADME.md && mv githubREADME.md README.md"
   },
   "repository": {