Fix commonJS imports

index.js

@@ -1,4 +1,4 @@
 // @flow
 
 import Permissions from './lib/permissions'
-export { Permissions as default }
+export default Permissions

lib/permissions.android.js

@@ -114,4 +114,4 @@ class ReactNativePermissions {
     )
 }
 
-module.exports = new ReactNativePermissions()
+export default new ReactNativePermissions()

lib/permissions.ios.js

@@ -104,4 +104,4 @@ class ReactNativePermissions {
     )
 }
 
-module.exports = new ReactNativePermissions()
+export default new ReactNativePermissions()