v1.2.1

Merge pull request #256 from concourse/bionic-base-image

switch to ubuntu:bionic for base image

v1.2.0

use mount from util-linux

busybox mount seems to have a limit on how much it can read from
/proc/mounts (3kb), meaning if you have a large entry in there preceding
the mount point you're remounting, it'll fail like so:

    mount: can't find /sys/fs/cgroup in /proc/mounts

using mount from util-linux works

Signed-off-by: Clara Fu <cfu@pivotal.io>
Co-authored-by: Mark Huang <mhuang@pivotal.io>
Co-authored-by: Alex Suraci <suraci.alex@gmail.com>

v1.1.0

Merge pull request #250 from john681611/cache-failover

Allow Build to continue if cache pull fails

v1.0.0

remove dependence on user.Current in tests