[pgjdbc/pgjdbc] 833a4a: attempt jdk 10 and postgresql 10 (#1298)

Branch: refs/heads/master
  Home:   https://github.com/pgjdbc/pgjdbc
  Commit: 833a4a1000781413b055eb4f334ed42aca8c8028
      https://github.com/pgjdbc/pgjdbc/commit/833a4a1000781413b055eb4f334ed42aca8c8028
  Author: Dave Cramer <davecramer@gmail.com>
  Date:   2018-09-14 (Fri, 14 Sep 2018)

  Changed paths:
    M .travis.yml

  Log Message:
  -----------
  attempt jdk 10 and postgresql 10 (#1298)

* use oracle jdk11 and openjdk-ea
* use 10.0 for postgres version



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