Update to Cordova 7.1.0, Android 6.3.0, and iOS 4.5.3

[skirunman]

This is a minor update to Cordova 7.1.0 and Cordova Android 6.3.0 and any other related plugins. We recently updated to Cordova iOS 4.5.1 meteor/meteor#9137 so ideally for the upcoming Meteor 1.6 release we would have latest Cordova versions included.

[abernix]

Meteor 1.6 is already in release candidate status, so unless it's fixing critical or must-fix bugs present in Meteor 1.6, I think this will need to wait.

[christocracy]

cordova@7.1.0 / android-6.3.0 allows plugin developers (like myself) to finally provide a mechanism to solve gradle conflicts with other libraries requesting different versions of play-services / firebase dependencies.

ie: Plugin developers can now expose <variable />s in one's config.xml to provide desired version for a <framework /> tag.

  <preference name="GOOGLE_API_VERSION" default="11.0.1" />
  <framework src="com.google.android.gms:play-services-location:$GOOGLE_API_VERSION"/>

$ cordova plugin add some-plugin --variable GOOGLE_API_VERSION=11.4.2
$ cordova plugin add phonegap-plugin-push --variable FCM_VERSION=11.4.2

[skirunman]

Added update to latest Cordova iOS 4.5.3.