chore(build): remove typings postinstall command

Author: filipesilva

package.json

@@ -9,8 +9,7 @@
   },
   "keywords": [],
   "scripts": {
-    "test": "node tests/runner",
-    "postinstall": "typings install"
+    "test": "node tests/runner"
   },
   "repository": {
     "type": "git",
@@ -45,7 +44,8 @@
     "resolve": "^1.0.0",
     "silent-error": "^1.0.0",
     "symlink-or-copy": "^1.0.1",
-    "typescript": "~1.7.3"
+    "typescript": "~1.7.3",
+    "typings": "^0.6.2"
   },
   "ember-addon": {
     "paths": [
@@ -62,7 +62,6 @@
     "rewire": "^2.3.4",
     "shelljs": "^0.5.3",
     "through": "^2.3.8",
-    "typings": "^0.6.2",
     "walk-sync": "^0.2.6"
   }
 }