Add podspec file (#23)

* Add podspec

* bump version

Author: ricsam

RNVoipPushNotification.podspec

@@ -0,0 +1,18 @@
+
+require 'json'
+
+package = JSON.parse(File.read(File.join(__dir__, 'package.json')))
+
+Pod::Spec.new do |s|
+  s.name                = "RNVoipPushNotification"
+  s.version             = package['version']
+  s.summary             = package['description']
+  s.homepage            = package['homepage']
+  s.license             = package['license']
+  s.author              = package['author']
+  s.source              = { :git => package['repository']['url'], :tag => "v#{s.version}" }
+  s.requires_arc        = true
+  s.platform            = :ios, "8.0"
+  s.source_files        = "ios/RNVoipPushNotification/*.{h,m}"
+  s.dependency 'React/Core'
+end

package.json

@@ -1,6 +1,6 @@
 {
   "name": "react-native-voip-push-notification",
-  "version": "1.1.2",
+  "version": "1.1.3",
   "description": "VoIP push notification on react-native",
   "main": "index.js",
   "scripts": {