chore(package.json): fix typo

mgechev · mgechev · commit fc3aa42efb29 · 2016-04-13T18:33:55.000+03:00
diff --git a/package.json b/package.json
@@ -5,7 +5,7 @@
   "main": "index.js",
   "scripts": {
     "test": "mocha --compilers ts:ts-node/register",
-    "postinstal": "npm run tsc",
+    "postinstall": "npm run tsc",
     "tsc": "tsc",
     "tscw": "tsc -w"
   },
