Internal: add "npm run release" command

—skip-test is used because of tesling (it does not like to be spawned
or something like that)…

package.json

@@ -25,6 +25,7 @@
     "coverify": "^1.0.6",
     "jscs": "^1.6.2",
     "jshint": "^2.5.6",
+    "npmpub": "^3.1.0",
     "serve": "1.4.0",
     "tape": "^3.0.0",
     "testling": "^1.6.1"
@@ -37,7 +38,8 @@
     "test--html": "testling --html > tests/scripts/index.html",
     "coverage": "browserify -t coverify tests/**/*.js | testling | coverify",
     "example": "echo '\n==> Open http://localhost:3000/example in your browser.'; serve .",
-    "prepublish": "npm run standalone"
+    "prepublish": "npm run standalone",
+    "release": "npm test && npmpub --skip-test"
   },
   "testling": {
     "files": "tests/**/*.js",