Updated podspec for a tag that doesn't exist yet.

fmdb.podspec

@@ -1,12 +1,12 @@
 Pod::Spec.new do |s|
   s.name = 'FMDB'
-  s.version = '2.1'
+  s.version = '2.3'
   s.summary = 'A Cocoa / Objective-C wrapper around SQLite.'
   s.homepage = 'https://github.com/ccgus/fmdb'
   s.license = 'MIT'
   s.author = { 'August Mueller' => 'gus@flyingmeat.com' }
   s.source = { :git => 'https://github.com/ccgus/fmdb.git',
-                 :tag => 'v2.1' }
+                 :tag => 'v2.3' }
 
   s.default_subspec = 'standard'