CI fixup

Signed-off-by: Thomas Citharel <tcit@tcit.fr>
3 jobs for master in 1 minute and 49 seconds (queued for 2 seconds)
Status Name Job ID Coverage
  Check
passed check #583785

00:00:51

 
  Test
failed mix #583786

00:00:58

 
  Deploy
skipped pages #583787
 
Name Stage Failure
failed
mix Test
 50.0% lib/ex_optimizer/optimizers/gifsicle.ex        27        2        1
100.0% lib/ex_optimizer/optimizers/jpeg_optim.e 28 1 0
100.0% lib/ex_optimizer/optimizers/optipng.ex 28 1 0
50.0% lib/ex_optimizer/optimizers/png_quant.ex 25 2 1
50.0% lib/ex_optimizer/optimizers/svgo.ex 28 2 1
[TOTAL] 73.3%
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Authenticating with credentials from /root/.docker/config.json
ERROR: Job failed: exit code 1