[pdal-commits] [PDAL/PDAL] e30460: Update Alpine version to 3.7 for Travis (#1799)

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/PDAL/PDAL
  Commit: e304603042eb2104ad222b13a2ac099455cebc1e
      https://github.com/PDAL/PDAL/commit/e304603042eb2104ad222b13a2ac099455cebc1e
  Author: chambbj <brad.chambers at gmail.com>
  Date:   2018-02-05 (Mon, 05 Feb 2018)

  Changed paths:
    M .travis.yml

  Log Message:
  -----------
  Update Alpine version to 3.7 for Travis (#1799)

We have been pushing Docker images built on Alpine v3.7, but our Travis config
has been stuck back on v3.6. These should match.