use package.json for versioning

rn-fetch-blob.podspec

@@ -1,11 +1,14 @@
+require "json"
+package = JSON.parse(File.read('package.json'))
+
 Pod::Spec.new do |s|
-  s.name             = "rn-fetch-blob"
-  s.version          = "0.10.16"
-  s.summary          = "A project committed to make file acess and data transfer easier, effiecient for React Native developers."
+  s.name             = package['name']
+  s.version          = package['version']
+  s.summary          = package['description']
   s.requires_arc = true
   s.license      = 'MIT'
   s.homepage     = 'n/a'
-  s.source       = { :git => "https://github.com/joltup/rn-fetch-blob", :tag => 'v0.10.16'}
+  s.source       = { :git => "https://github.com/joltup/rn-fetch-blob" }
   s.author       = 'Joltup'
   s.source_files = 'ios/**/*.{h,m}'
   s.platform     = :ios, "8.0"