Update podspec to include the same deployment targets as defined by the Xcode project

FMDB.podspec

@@ -7,8 +7,10 @@ Pod::Spec.new do |s|
   s.author = { 'August Mueller' => 'gus@flyingmeat.com' }
   s.source = { :git => 'https://github.com/ccgus/fmdb.git', :tag => "#{s.version}" }
   s.requires_arc = true
-  s.osx.deployment_target  = '10.11'
-  s.default_subspec = 'standard'  
+  s.ios.deployment_target = '9.2'
+  s.osx.deployment_target = '10.11'
+  s.watchos.deployment_target = '2.0'
+  s.default_subspec = 'standard'
 
   # use the built-in library version of sqlite3
   s.subspec 'standard' do |ss|