watchOS 2 support

[j-hit]

When trying to add SwiftKeychainWrapper to a WatchKit Extension target using Cocoapods an error occurs stating the following:

[!] The platform of the target cosy WatchKit Extension (watchOS 2.0) is not compatible with SwiftKeychainWrapper (1.0.11), which does not support watchos.

Definition used in the Podfile

target 'cosy WatchKit Extension' do
  platform :watchos, '2.0'
  pod 'SwiftKeychainWrapper'
end

[LeoSnek]

I can confirm it's working fine in WatchOS 7