[pgjdbc/pgjdbc] acb9bd: chore: introduce release via Travis

  Branch: refs/heads/master
  Home:   https://github.com/pgjdbc/pgjdbc
  Commit: acb9bddf36a8af6d1dd09857a6a05014c3e8849a
      https://github.com/pgjdbc/pgjdbc/commit/acb9bddf36a8af6d1dd09857a6a05014c3e8849a
  Author: Vladimir Sitnikov <sitnikov.vladimir@gmail.com>
  Date:   2018-01-15 (Mon, 15 Jan 2018)

  Changed paths:
    M .travis.yml
    A .travis/secrets.tar.enc
    M .travis/travis_deploy.sh
    A .travis/travis_release.sh
    M CONTRIBUTING.md
    M settings.xml

  Log Message:
  -----------
  chore: introduce release via Travis

This provides an option to deploy pgjdbc releases to Maven Central via push to `release/master` branch


  Commit: 3ba3b6334761909183334a3be3af0aa8dc4798da
      https://github.com/pgjdbc/pgjdbc/commit/3ba3b6334761909183334a3be3af0aa8dc4798da
  Author: Vladimir Sitnikov <sitnikov.vladimir@gmail.com>
  Date:   2018-01-15 (Mon, 15 Jan 2018)

  Changed paths:
    M .travis.yml
    M appveyor.yml

  Log Message:
  -----------
  chore: skip CI builds for tags; skip Fedora and extendedCacheEverything jobs when building pull requests


Compare: https://github.com/pgjdbc/pgjdbc/compare/1be8a9ebafbf...3ba3b6334761