update podspec

Promises.podspec

@@ -1,13 +1,13 @@
 Pod::Spec.new do |s|
-  s.name             = "Promise"
-  s.version          = "v2.0"
+  s.name             = "Promises"
+  s.version          = "2.0"
   s.summary          = "A Promise library for Swift"
   s.description      = "A Promise library for Swift, based partially on Javascript's A+ spec"
   s.module_name      = "Promise"
   s.homepage         = "https://github.com/khanlou/Promise"
   s.license          = 'MIT'
   s.author           = { "Soroush Khanlou" => "[email protected]" }
-  s.source           = { :git => "https://github.com/khanlou/Promise.git", :tag => "#{spec.version}" }
+  s.source           = { :git => "https://github.com/khanlou/Promise.git", :tag => "#{s.version}" }
   s.social_media_url = 'https://twitter.com/khanlou'
   s.source_files = 'Sources/*.swift'
   s.cocoapods_version = '>= 1.0'