prepublish script

Author: dashed

package.json

@@ -28,6 +28,7 @@
     "build": "microbundle",
     "dev": "microbundle watch",
     "pretty": "prettier --write --tab-width 4 'src/**/*.js' 'test/**/*.js'",
+    "prepublish": "npm run lint && npm run test && npm run build",
     "lint": "eslint src test",
     "flow": "flow"
   },