[maven-release-plugin] prepare release apns-0.1.6
[maven-release-plugin] prepare release apns-0.1.6

bilalsas/java-apns,notnoop/java-apns,talk-to/java-apns,t-watana/java-apns,borellaster/java-apns,Catapush/java-apns,t-watana/java-apns,leancloud/java-apns,treejames/java-apns,SinnerSchraderMobileMirrors/java-apns,treejames/java-apns,noahxinhao/java-apns,mukhanov/java-apns,notnoop/java-apns,noahxinhao/java-apns,talk-to/java-apns,borellaster/java-apns,flozano/java-apns,mukhanov/java-apns,Catapush/java-apns,l0s/java-apns,l0s/java-apns