[xiphos-source] [crosswire/xiphos] 9f90df: Test on Ubuntu 19.10

[Greg Hellings]

  Branch: refs/heads/master
  Home:   https://github.com/crosswire/xiphos
  Commit: 9f90df421532f8d3ebf698e0c3afac5efc7d700e
      https://github.com/crosswire/xiphos/commit/9f90df421532f8d3ebf698e0c3afac5efc7d700e
  Author: Gregory Hellings <greg.hellings at gmail.com>
  Date:   2020-03-17 (Tue, 17 Mar 2020)

  Changed paths:
    M .travis.yml
    M CMakeLists.txt

  Log Message:
  -----------
  Test on Ubuntu 19.10

Test builds on Ubuntu 19.10 instead of latest
Increase CMake requirements to 3.11