tree 57fa37b392cb8c15c4e639f8d9054612c348daf5
parent 4225b1a966622c9d33b3e757f61b50ee34839d69
author Peter Kolbus <peter.kolbus@garmin.com> 1559396670 -0500
committer Peter Kolbus <peter.kolbus@garmin.com> 1561848334 -0500

Change Docker container to bionic

Commit 117b8a45164bdb5ad2ab9e6809cbc923cffa338e requires version 6+
of i686-w64-mingw32-gcc to run the mingw builds, but Ubuntu Xenial (16.04)
supplies 5.3.1. Change the Docker container to Ubuntu Bionic (18.04) to
pick up a version that will run the tests.