Update .gitlab-ci.yml

2 jobs for master in 2 minutes and 24 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
passed #5339
linux

00:02:24

failed #5340
redox

00:01:11

 
Name Stage Failure
failed
redox Test

Caused by:
editions are unstable

Caused by:
feature `edition` is required

consider adding `cargo-features = ["edition"]` to the manifest
ERROR: Job failed: exit code 1