Update Maven Content Package plugin version
Update Maven Content Package plugin version

The version of the content-package-maven-plugin used (0.0.20) is not compatible with Maven 3.3.1 or higher.
savs/aem-phonegap-starter-kit,savs/aem-phonegap-starter-kit,Adobe-Marketing-Cloud-Apps/aem-phonegap-starter-kit,savs/aem-phonegap-starter-kit,Adobe-Marketing-Cloud-Apps/aem-phonegap-starter-kit,Adobe-Marketing-Cloud-Apps/aem-phonegap-starter-kit,blefebvre/aem-phonegap-starter-kit,blefebvre/aem-phonegap-starter-kit,savs/aem-phonegap-starter-kit,savs/aem-phonegap-starter-kit,Adobe-Marketing-Cloud-Apps/aem-phonegap-starter-kit,blefebvre/aem-phonegap-starter-kit,savs/aem-phonegap-starter-kit,blefebvre/aem-phonegap-starter-kit,savs/aem-phonegap-starter-kit,savs/aem-phonegap-starter-kit