Export a UMD module.

Author: developit

.babelrc

@@ -1,3 +1,4 @@
 {
-  "modules": "ignore"
+  "comments": false,
+  "loose": "all"
 }

package.json

@@ -1,10 +1,11 @@
 {
   "name": "proptypes",
   "version": "0.14.1",
+  "amdName": "PropTypes",
   "description": "React's PropTypes, packaged up as a standalone module.",
   "main": "index.js",
   "scripts": {
-    "build": "babel -f $npm_package_main -s -o $npm_package_main < src/index.js"
+    "build": "babel -f $npm_package_main -m umd --module-id $npm_package_amdName -s -o $npm_package_main < src/index.js"
   },
   "repository": {
     "type": "git",