Add publish-patch npm script

Author: markdalgleish

package.json

@@ -34,6 +34,7 @@
     "precover": "npm run lint",
     "cover": "istanbul cover test.js",
     "travis": "npm run cover -- --report lcovonly",
-    "prepublish": "npm prune && npm test"
+    "prepublish": "npm prune && npm test",
+    "publish-patch": "npm prune && npm test && npm version patch && git push && git push --tags && npm publish"
   }
 }