updated package.json

Author: jetako

packages/mst-async-task/package.json

@@ -19,14 +19,16 @@
     "build": "tsc && cpr build dist --overwrite --filter=\\.js$ && rollup -c",
     "dev": "tsc -w",
     "test": "jest",
-    "lint": "eslint ."
+    "lint": "eslint .",
+    "prepublish": "yarn build"
   },
   "repository": {
     "type": "git",
     "url": "git+https://github.com/jetako/mst-async-task.git"
   },
   "keywords": [
     "mobx-state-tree",
+    "action",
     "async",
     "promise",
     "task"